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Caño-Carrillo I, Gilbert-López B, Montero L, Martínez-Piernas AB, García-Reyes JF, Molina-Díaz A. Comprehensive and heart-cutting multidimensional liquid chromatography-mass spectrometry and its applications in food analysis. MASS SPECTROMETRY REVIEWS 2024; 43:936-976. [PMID: 37056215 DOI: 10.1002/mas.21845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 03/07/2023] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
In food analysis, conventional one-dimensional liquid chromatography methods sometimes lack sufficient separation power due to the complexity and heterogeneity of the analyzed matrices. Therefore, the use of two-dimensional liquid chromatography (2D-LC) turns out to be a powerful tool to consider, especially when coupled to mass spectrometry (MS). This review presents the most remarkable 2D-LC-MS food applications reported in the last 10 years, including a critical discussion of the multiple approaches, modulation strategies as well as the importance of the optimization of the different analytical aspects that will condition the 2D-LC-MS performance. The presence of contaminants in food (food safety), the food quality, and authenticity or the relationship between the beneficial effects of food and human health are some of the fields in which most of the 2D-LC-MS applications are mainly focused. Both heart-cutting and comprehensive applications are described and discussed in this review, highlighting the potential of 2D-LC-MS for the analysis of such complex samples.
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Affiliation(s)
- Irene Caño-Carrillo
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
| | - Bienvenida Gilbert-López
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
- University Research Institute for Olives Grove and Olive Oil, University of Jaén, Jaén, Spain
| | - Lidia Montero
- Institute of Food Science Research-CIAL (CSIC-UAM), Madrid, Spain
| | - Ana B Martínez-Piernas
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
| | - Juan F García-Reyes
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
- University Research Institute for Olives Grove and Olive Oil, University of Jaén, Jaén, Spain
| | - Antonio Molina-Díaz
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
- University Research Institute for Olives Grove and Olive Oil, University of Jaén, Jaén, Spain
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2
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Serafimov K, Knappe C, Li F, Sievers-Engler A, Lämmerhofer M. Solving the retention time repeatability problem of hydrophilic interaction liquid chromatography. J Chromatogr A 2024; 1730:465060. [PMID: 38861823 DOI: 10.1016/j.chroma.2024.465060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 06/05/2024] [Accepted: 06/07/2024] [Indexed: 06/13/2024]
Abstract
Hydrophilic interaction (liquid) chromatography (HILIC) has become the first choice LC mode for the separation of hydrophilic analytes. Numerous studies reported the poor retention time repeatability of HILIC. The problem was often ascribed to slow equilibration and insufficient re-equilibration time to establish the sensitive semi-immobilized water layer at the interface of the polar stationary phase and the bulk mobile phase. In this study, we compare retention time repeatability in HILIC for borosilicate glass and PFA (co-polymer of tetrafluoroethylene and perfluoroalkoxyethylene) solvent bottles. During this study, we observed peak patterns shifting towards higher retention times (for metabolites and peptides) and lower retention times (oligonucleotide sample) with ongoing analysis time when standard borosilicate glass bottles were used as solvent reservoirs. It was hypothesized that release of ions (sodium, potassium, borate, etc.) from the borosilicate glass bottles leads to alterations (thickness and electrostatic screening effects) in the semi-immobilized water layer which is adsorbed to the polar stationary phase surface under acetonitrile-rich eluents in HILIC with concomitant shifts in retention. When PFA solvent bottles were employed instead of borosilicate glass, retention time repeatability was greatly improved and changed from average 8.4 % RSD for the tested metabolites with borosilicate glass bottles to 0.14 % RSD for the PFA solvent bottles (30 injections over 12 h). Similar improvements were observed for peptides and oligonucleotides. This simple solution to the retention time repeatability problem in HILIC might contribute to a better acceptance of HILIC, especially in fields like targeted and untargeted metabolomics, peptide and oligonucleotide analysis.
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Affiliation(s)
- Kristian Serafimov
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Cornelius Knappe
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Feiyang Li
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Adrian Sievers-Engler
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Michael Lämmerhofer
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany.
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3
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Laganà Vinci R, Arena K, Rigano F, Cacciola F, Dugo P, Mondello L. Prediction of retention data of phenolic compounds by quantitative structure retention relationship models under reverse-phase liquid chromatography. J Chromatogr A 2024; 1730:465146. [PMID: 39025025 DOI: 10.1016/j.chroma.2024.465146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 07/03/2024] [Accepted: 07/04/2024] [Indexed: 07/20/2024]
Abstract
Quantitative Structure-Retention Relationship models were developed to identify phenolic compounds using a typical LC- system, with both UV and MS detection. A new chromatographic method was developed for the separation of fifty-two standard phenolic compounds. Over 5000 descriptors for each standard were calculated using AlvaDesc software and then selected through Genetic Algorithm. The selected descriptors were used as variables for models construction and to obtain a better understanding of the retention behaviour of phenols during reverse-phase separation. Three distinct molecule sets, including fifty-two phenolic compounds (Set 1), 32 flavonoids (Set 2) and 15 mono-substituted flavonoids were divided into training and validation sets to build Partial Least Square, Multiple Linear Regression and Partial Least Square-Artificial Neural Network models. To assess the predictivity of the models, these were tested on a bergamot juice sample. Partial Least Square and Partial Least Square-Artificial Neural Network exhibit the lowest prediction error, and the latter showed the best predictive power in real sample recognition. The building and implementation of such predictive models showed to be a powerful tool to identify phenolic compounds based on retention data and avoiding the use of expensive and sophisticated detectors such as tandem MS.
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Affiliation(s)
- Roberto Laganà Vinci
- Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc 98168 - Messina, Italy
| | - Katia Arena
- Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc 98168 - Messina, Italy
| | - Francesca Rigano
- Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc 98168 - Messina, Italy.
| | - Francesco Cacciola
- Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali, Università degli Studi di Messina, Via Consolare Valeria, Messina 98125, Italy
| | - Paola Dugo
- Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc 98168 - Messina, Italy; Chromaleont s.r.l. c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc 98168 - Messina, Italy
| | - Luigi Mondello
- Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc 98168 - Messina, Italy; Chromaleont s.r.l. c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc 98168 - Messina, Italy
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4
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Taviano MF, Arena P, Davì F, Cavò E, Spadaro V, Raimondo FM, Cacciola F, Laganà Vinci R, Mondello L, Miceli N. Contribution of Phenolic Compounds to the Antioxidant Activity of Leaf and Flower Extracts of Sinapis pubescens L. subsp. pubescens (Brassicaceae). Chem Biodivers 2024; 21:e202400272. [PMID: 38489001 DOI: 10.1002/cbdv.202400272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 03/17/2024]
Abstract
Within a study focused on Sinapis pubescens subsp. pubescens wild from Sicily (Italy), an edible species still unexplored, our earlier published work has demonstrated good in vitro antioxidant properties for the flower and leaf hydroalcoholic extracts, exhibiting quite different qualitative-quantitative phenolic profiles. Herein, further research was designed to elucidate the role played by phenolic compounds in the different antioxidant mechanisms highlighted for the extracts. To achieve this goal, the crude extracts were subjected to liquid-liquid partitioning with solvents of increasing polarity; then, the fractions were investigated for their antioxidant properties using different in vitro assays. For both flowers and leaves, the ethyl acetate fractions exhibited the best activity in DPPH and reducing power assays, followed by n-butanol. The total phenolic content determination indicated these fractions as the phenolic-rich ones, which were characterized by HPLC-PDA/ESI-MS analysis. Conversely, the phenolic-rich fractions did not show any chelating activity, which was highlighted for the more hydrophobic ones.
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Affiliation(s)
- Maria Fernanda Taviano
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy
| | - Paola Arena
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy
- Foundation "Prof. Antonio Imbesi", University of Messina, Piazza Pugliatti 1, 98122, Messina, Italy
| | - Federica Davì
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy
- Foundation "Prof. Antonio Imbesi", University of Messina, Piazza Pugliatti 1, 98122, Messina, Italy
| | - Emilia Cavò
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy
| | - Vivienne Spadaro
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Section of Botany, Anthropology and Zoology, University of Palermo, Via Archirafi 38, 90123, Palermo, Italy
| | - Francesco Maria Raimondo
- PLANTA/Research, Documentation and Training Center, Via Serraglio Vecchio 28, 90123, Palermo, Italy
| | - Francesco Cacciola
- Department of Biomedical, Dental, Morphological and Functional Imaging Sciences, University of Messina, Via Consolare Valeria, 98125, Messina, Italy
| | - Roberto Laganà Vinci
- Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc, 98168 -, Messina, Italy
| | - Luigi Mondello
- Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc, 98168 -, Messina, Italy
- Chromaleont s.r.l., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, former Veterinary School, University of Messina, Viale G. Palatucci snc, 98168 -, Messina, Italy
| | - Natalizia Miceli
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy
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Hurkul MM, Cetinkaya A, Kaya SI, Yayla S, Ozkan SA. Investigation of Health Effects of Major Phenolic Compounds in Foods: Extraction Processes, Analytical Approaches and Applications. Crit Rev Anal Chem 2024:1-35. [PMID: 38650305 DOI: 10.1080/10408347.2024.2336981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
The escalating costs of healthcare services and a growing awareness of personal health responsibilities have led individuals to explore natural methods alongside conventional medicines for health improvement and disease prevention. The aging global population is experiencing increased health needs, notably related to conditions like diabetes, heart disease, and hypertension. Lifestyle-related diseases, poor dietary habits, and sedentary lifestyles underscore the importance of foods containing nutrients that can aid in preventing and managing these diseases. Phenolic compounds, a fundamental group of phytochemicals, are prominent in the chemical diversity of the natural world and are abundant in functional foods. Widely distributed in various plant parts, these compounds exhibit important functional and sensory properties, including color, taste, and aroma. Their diverse functionalities, particularly antioxidant activity, play a crucial role in mitigating cellular oxidative stress, potentially reducing damage associated with serious health issues such as cardiovascular disease, neurodegenerative disea23ses, and cancer. Phenolic compounds exist in different forms, some combined with glycosides, impacting their biological effects and absorption. Approximately 8000 polyphenols isolated from plants offer significant potential for natural medicines and nutritional supplements. Therefore, their extraction process and selective and sensitive food determination are very important. This review focuses on the extraction processes, analytical methods, and health effects of major phenolic compounds in foods. The examination encompasses a comprehensive analysis of analytical approaches and their applications in elucidating the presence and impact of these compounds on human health.
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Affiliation(s)
- M Mesud Hurkul
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - Ahmet Cetinkaya
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - S Irem Kaya
- Department of Analytical Chemistry, Gulhane Faculty of Pharmacy, University of Health Sciences, Ankara, Turkey
| | - Seyda Yayla
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Ankara University, Ankara, Turkey
- Graduate School of Health Sciences, Ankara University, Ankara, Turkey
| | - Sibel A Ozkan
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
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Vergara-Barberán M, Lerma-García MJ, Simó-Alfonso EF, García-Alvarez-Coque MC. Use of polyphenolic fingerprints established by comprehensive two-dimensional liquid chromatography for the classification of honeys according to their floral origin. J Chromatogr A 2023; 1705:464138. [PMID: 37392638 DOI: 10.1016/j.chroma.2023.464138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 05/31/2023] [Accepted: 06/07/2023] [Indexed: 07/03/2023]
Abstract
In this work, the polyphenolic composition of honeys from three different floral origins (chestnut, heather, and thyme), coming from different geographical areas of Spain was investigated. First, samples were characterized in terms of total phenolic content (TPC) and antioxidant capacity, which was established by three different assays. The results revealed that the studied honeys presented similar TPCs and antioxidant capacities, with a wide variability within each floral origin. Next, a comprehensive two-dimensional liquid chromatography method was developed for the first time to establish polyphenol fingerprints of the three types of honeys, after optimizing the separation in terms of column combination and mobile phase gradient programs. After that, the detected common peaks were used for the construction of a linear discriminant analysis (LDA) model able to discriminate honeys according to their floral origin. The LDA model obtained was adequate for the classification of the floral origin of the honeys based on polyphenolic fingerprint data.
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Affiliation(s)
- María Vergara-Barberán
- Department of Chemical Engineering and Analytical Chemistry, Institute for Research on Nutrition and Food Safety (INSA-UB), University of Barcelona, Martí i Franquès 1-11, Barcelona 08028, Spain; Department of Analytical Chemistry, University of Valencia, C/Dr. Moliner 50, Valencia, Burjassot 46100, Spain
| | - María Jesús Lerma-García
- Department of Analytical Chemistry, University of Valencia, C/Dr. Moliner 50, Valencia, Burjassot 46100, Spain
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Li W, Huang J, Zheng L, Liu W, Fan L, Sun B, Su G, Xu J, Zhao M. A fast stop-flow two-dimensional liquid chromatography tandem mass spectrometry and its application in food-derived protein hydrolysates. Food Chem 2023; 406:135000. [PMID: 36463605 DOI: 10.1016/j.foodchem.2022.135000] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 10/10/2022] [Accepted: 11/16/2022] [Indexed: 11/21/2022]
Abstract
Food-derived bioactive peptides have many outstanding features like high safety, easy absorption, etc. However, explorations of the peptides are suffering from the limited knowledge of sample composition and low efficiency of separation techniques. In this work, a fast stop-flow two-dimensional liquid chromatography tandem mass spectrometry (2DLC-MS) was designed and constructed in-house. For chromatographic system optimization, the effects of column pairs and fraction transfer volumes on separation performance were studied. The pair of Protein BEH SEC and HSS T3 columns was found of high orthogonality. The peak capacity detected by the optimized 2DLC reached 1165 (for corn protein hydrolysates), indicating high resolving power. Moreover, the number of peptides identified from corn, soybean and casein protein hydrolysates reached as high as 8330, 8925 and 7215, respectively, demonstrating the high potential of the system. This would help reveal the peptide composition and facilitate the research on exploring bioactive peptides from food-derived protein hydrolysates.
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Affiliation(s)
- Wu Li
- School of Biotechnology and Health Sciences & International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529020, China
| | - Junhong Huang
- School of Biotechnology and Health Sciences & International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529020, China
| | - Lin Zheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China
| | - Wanshun Liu
- School of Biotechnology and Health Sciences & International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529020, China
| | - Liqi Fan
- School of Biotechnology and Health Sciences & International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529020, China
| | - Baoguo Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China
| | - Guowan Su
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China
| | - Jucai Xu
- School of Biotechnology and Health Sciences & International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529020, China; School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China.
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China.
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8
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Caño-Carrillo I, Gilbert-López B, Montero L, Martínez-Piernas AB, García-Reyes JF, Molina-Díaz A. Comprehensive and heart-cutting multidimensional liquid chromatography-mass spectrometry and its applications in food analysis. MASS SPECTROMETRY REVIEWS 2023. [PMID: 37010157 DOI: 10.1002/mas.21843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 03/07/2023] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
In food analysis, conventional one-dimensional liquid chromatography methods sometimes lack sufficient separation power due to the complexity and heterogeneity of the analysed matrices. Therefore, the use of two-dimensional liquid chromatography (2D-LC) turns out to be a powerful tool to consider, especially when coupled to mass spectrometry (MS). This review presents the most remarkable 2D-LC-MS food applications reported in the last 10 years, including a critical discussion of the multiple approaches, modulation strategies as well as the importance of the optimisation of the different analytical aspects that will condition the 2D-LC-MS performance. The presence of contaminants in food (food safety), the food quality and authenticity or the relationship between the beneficial effects of food and human health are some of the fields in which most of the 2D-LC-MS applications are mainly focused. Both heart-cutting and comprehensive applications are described and discussed in this review, highlighting the potential of 2D-LC-MS for the analysis of such complex samples.
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Affiliation(s)
- Irene Caño-Carrillo
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
| | - Bienvenida Gilbert-López
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
- University Research Institute for Olives Grove and Olive Oil, University of Jaén, Jaén, Spain
| | - Lidia Montero
- Institute of Food Science Research-CIAL (CSIC-UAM), Madrid, Spain
| | - Ana B Martínez-Piernas
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
| | - Juan F García-Reyes
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
- University Research Institute for Olives Grove and Olive Oil, University of Jaén, Jaén, Spain
| | - Antonio Molina-Díaz
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Jaén, Spain
- University Research Institute for Olives Grove and Olive Oil, University of Jaén, Jaén, Spain
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9
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Muller M, de Villiers A. A detailed evaluation of the advantages and limitations of online RP-LC×HILIC compared to HILIC×RP-LC for phenolic analysis. J Chromatogr A 2023; 1692:463843. [PMID: 36780845 DOI: 10.1016/j.chroma.2023.463843] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/20/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023]
Abstract
The combination of hydrophilic interaction chromatography (HILIC) and reversed-phase liquid chromatography (RP-LC) has proved effective in the LC × LC analysis of polyphenols due to the high degree of orthogonality associated with these separation modes for various classes of phenolic compounds. However, despite the growing number of such applications, HILIC is almost exclusively used as the first dimension (1D) separation mode, and RP-LC in the second dimension (2D). This is somewhat surprising in light of the potential advantages of swapping these separation modes. In this contribution, we present a detailed evaluation of the potential of online RP-LC × HILIC-MS for the analysis of phenolic compounds, comparing the performance of this system to the more established HILIC × RP-LC-MS configuration. Method development was performed using a predictive optimisation program, and fixed solvent modulation was employed to combat the solvent incompatibility between HILIC and RP-LC mobile phases. Red wine, rooibos tea, Protea and chestnut phenolic extracts containing a large diversity of phenolic compound classes were analysed by both HILIC × RP-LC- and RP-LC × HILIC-MS in order to compare the separation performance. Overall, the kinetic performance of HILIC × RP-LC was found to be clearly superior, with higher peak capacities and better resolution obtained for the majority of samples compared to RP-LC × HILIC analyses using similar column dimensions. Dilution of the 1D solvent combined with large volume injections proved insufficient to focus especially phenolic acids in the 2D HILIC separation, which resulted in severe 2D peak distortion for these compounds, and negatively impacted on method performance. On the other hand, a noteworthy improvement in the sensitivity of RP-LC × HILIC-MS analyses was observed due to higher ESI-MS response for the 2D HILIC mobile phase and greater sample loading capacity of the 1D RP-LC column, brought on by the high solubility of phenolic samples in aqueous solutions. As a result, a significantly higher number of compounds were detected in the RP-LC × HILIC-MS separations. These findings point to the potential advantage of RP-LC × HILIC as a complementary configuration to HILIC × RP-LC for phenolic analysis.
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Affiliation(s)
- Magriet Muller
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
| | - André de Villiers
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa.
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10
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Zhu LW, Xie BY, Liu SZ, Wu YH, Zhang GG, Qiu YK. Development of an On-Line Two-dimensional Normal Phase Liquid Chromatography System for Analysis of Weakly Polar Samples. Chromatographia 2023. [DOI: 10.1007/s10337-022-04230-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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11
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Rajput A, Sharma P, Singh D, Singh S, Kaur P, Attri S, Mohana P, Kaur H, Rashid F, Bhatia A, Jankowski J, Arora V, Tuli HS, Arora S. Role of polyphenolic compounds and their nanoformulations: a comprehensive review on cross-talk between chronic kidney and cardiovascular diseases. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:901-924. [PMID: 36826494 DOI: 10.1007/s00210-023-02410-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 01/26/2023] [Indexed: 02/25/2023]
Abstract
Chronic kidney disease (CKD) affects a huge portion of the world's population and frequently leads to cardiovascular diseases (CVDs). It might be because of common risk factors between chronic kidney disease and cardiovascular diseases. Renal dysfunction caused by chronic kidney disease creates oxidative stress which in turn leads to cardiovascular diseases. Oxidative stress causes endothelial dysfunction and inflammation in heart which results in atherosclerosis. It ends in clogging of veins and arteries that causes cardiac stroke and myocardial infarction. To develop an innovative therapeutic approach and new drugs to treat these diseases, it is important to understand the pathophysiological mechanism behind the CKD and CVDs and their interrelationship. Natural phytoconstituents of plants such as polyphenolic compounds are well known for their medicinal value. Polyphenols are plant secondary metabolites with immense antioxidant properties, which can protect from free radical damage. Nowadays, polyphenols are generating a lot of buzz in the scientific community because of their potential health benefits especially in the case of heart and kidney diseases. This review provides a detailed account of the pathophysiological link between CKD and CVDs and the pharmacological potential of polyphenols and their nanoformulations in promoting cardiovascular and renal health.
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Affiliation(s)
- Ankita Rajput
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Palvi Sharma
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Davinder Singh
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Sharabjit Singh
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Prabhjot Kaur
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Shivani Attri
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Pallvi Mohana
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Harneetpal Kaur
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Farhana Rashid
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Astha Bhatia
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Joachim Jankowski
- Institute for Molecular Cardiovascular Research, RWTH Aachen University, Aachen, Germany
| | - Vanita Arora
- Sri Sukhmani Dental College & Hospital, Derabassi, Punjab, India
| | - Hardeep Singh Tuli
- Department of Biotechnology, Maharishi Markandeshwar Engineering College, Maharishi Markandeshwar (Deemed to be University), Mullana-Ambala, 133207, India
| | - Saroj Arora
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India.
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12
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Montero L, Ayala-Cabrera JF, Bristy FF, Schmitz OJ. Multi- 2D LC × LC as a Novel and Powerful Implement for the Maximum Separation of Complex Samples. Anal Chem 2023; 95:3398-3405. [PMID: 36721361 DOI: 10.1021/acs.analchem.2c04870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Achieving complete information about the chemical composition of complex samples requires the use of multianalytical platforms able to maximize the acquisition of high-quality data for unequivocal identification. However, this process requires long analysis times and several instruments. Food analysis is one of the analytical fields where the analysis of very complex samples has a huge impact. One of these complex samples is vermouth, a fortified wine based on the maceration of a large number of herbs, fruits, barks, seeds, and leaves. The application of conventional or even advanced analytical techniques like comprehensive two-dimensional (2D) liquid chromatography (LC × LC) does not provide enough separation power to resolve the complete profile of this sample. In this work, a novel 2DLC strategy called multi-2D LC × LC is developed. This new setup consists of the use of two different columns with different separation properties in the second dimension (2D) that can be selected during the LC × LC analysis accordingly to the chemical nature of the compounds eluted from the first dimension (1D). The vermouth sample was analyzed using a 1D-PFP and a combination of HILIC (from 0 to 30 min) and C18 (from 30 to the end) columns in the 2D. This setup increased both the peak capacity and the orthogonality of the analysis in comparison to the use of only one of the columns in the 2D. Multi-2D LC × LC is presented as an integrated 2DLC tool that maximizes the separation capacity for very complex samples.
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Affiliation(s)
- Lidia Montero
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany.,Teaching and Research Center for Separation, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany
| | - Juan F Ayala-Cabrera
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany.,Teaching and Research Center for Separation, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany
| | - Fariha F Bristy
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany.,Teaching and Research Center for Separation, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany
| | - Oliver J Schmitz
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany.,Teaching and Research Center for Separation, University of Duisburg-Essen, Universitaetsstr. 5, 45141Essen, Germany
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13
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Cacciola F, Arena K, Dugo P, Mondello L. New Frontiers in Multidimensional Liquid Chromatography. LCGC EUROPE 2022. [DOI: 10.56530/lcgc.eu.zg3980s2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
In this extended special feature to celebrate the 35th anniversary edition of LCGC Europe, leading figures from the separation science community explore contemporary trends in separation science and identify possible future developments.
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14
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Analysis of 17-Hydroxygeranyllinalool Diterpene Glycosides in Nicotiana tabacum by Using Heart-Cutting 2D-LC Coupled with Tandem MS Technique. Chromatographia 2022. [DOI: 10.1007/s10337-022-04188-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Jaiswal N, Kumar A. HPLC in the discovery of plant phenolics as antifungal molecules against Candida infection related biofilms. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Determination of the polyphenolic content of berry juices using focusing-modulated comprehensive two-dimensional liquid chromatography coupled to mass spectrometry detection. Anal Bioanal Chem 2022; 415:2371-2382. [PMID: 35836012 DOI: 10.1007/s00216-022-04216-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/24/2022] [Accepted: 06/29/2022] [Indexed: 11/01/2022]
Abstract
In this work, a comprehensive two-dimensional liquid chromatography system, comprised of a ZIC-HILIC and C18 columns in the first and second dimensions, respectively, was tuned and employed for attaining high resolution profiles of the polyphenolic pattern in seven commercial berry juices. The developed HILIC × RP-LC method was validated in terms of linearity range, correlation coefficients, limit of detection, limit of quantification, precision (intra- and inter-day), and recovery. A total of 104 polyphenolic compounds belonging to different chemical classes (hydroxybenzoic and cinnamic acid derivatives, flavone glycosides, flavonols, flavonol glycosides, dihydroflavonols, and anthocyanin glycosides) have been characterized and quantified in the juices investigated. Despite the constituents being similar, a notable quantitative variation among the analyzed berry species was observed. Elderberry contained the highest amount of polyphenols (918 ± 1.10 mg 100 mL-1), followed by chokeberry (516 ± 0.08 mg 100 mL-1). On the other hand, raspberry contained the lowest amount (104 ± 1.21 mg 100 mL-1). Further, total phenolic, flavonoid, and anthocyanin contents were determined spectrophotometrically, yielding consistent results. The free-radical scavenging activity (DPPH test) and reducing power of the juices, expressed as IC50 (μL mL-1) and mg ASE mL-1, varied from 2.79 ± 0.03 (honeyberry) to 31.66 ± 0.02 (blueberry) and from 1.71 ± 0.01 (blueberry) to 8.89 ± 0.12 (chokeberry), respectively. Such a ZIC-HILIC × C18 platform based on focusing modulation, never employed so far for berry juices, showed a remarkable separation capability with high values of corrected peak capacity (up to 1372) and orthogonality (Ao up to 0.80), thus providing a great applicability to be advantageously employed for other complex food samples.
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17
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Sheng Q, Wang L, Zhang L, Wang X, Qian S, Lan M, Qing G, Liang X. High-efficiency Two-dimensional Separation of Natural Products Based on β-Cyclodextrin Stationary Phase Working in Both Hydrophilic and Reversed Hydrophobic Modes. J Chromatogr A 2022; 1673:463069. [DOI: 10.1016/j.chroma.2022.463069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/09/2022] [Accepted: 04/14/2022] [Indexed: 10/18/2022]
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18
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Arena K, Trovato E, Cacciola F, Spagnuolo L, Pannucci E, Guarnaccia P, Santi L, Dugo P, Mondello L, Dugo L. Phytochemical Characterization of Rhus coriaria L. Extracts by Headspace Solid-Phase Micro Extraction Gas Chromatography, Comprehensive Two-Dimensional Liquid Chromatography, and Antioxidant Activity Evaluation. Molecules 2022; 27:1727. [PMID: 35268827 PMCID: PMC8912007 DOI: 10.3390/molecules27051727] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 02/28/2022] [Accepted: 03/01/2022] [Indexed: 12/10/2022] Open
Abstract
Rhus coriaria L. (Anacardiaceae), commonly known as sumac, has been used since ancient times for many different applications, and nowadays is used mostly as a spice obtained from its in the Mediterranean and the Middle ground fruits and employed for flavoring and garnishing food, predominantly Eastern regions. Traditionally, sumac has been also used in popular medicine for the treatment of many ailments including hemorrhoids, wound healing, diarrhea, ulcers, and eye inflammation. Sumac drupes are indeed rich in various classes of phytochemicals including organic acids, flavonoids, tannins, and others, which are responsible of their powerful antioxidant capacity, from which treatment of many common diseases such as cardiovascular disease, diabetes, and cancer could benefit. In this work we evaluated the influence of fruit ripeness, conservation, and processing. To this aim, a phytochemical characterization of six different samples of Rhus coriaria L. was carried out. Specifically, headspace solid-phase micro extraction gas chromatography coupled to mass spectrometry and comprehensive two-dimensional liquid chromatography coupled to photodiode array and mass spectrometry detection, were employed. A total of 263 volatile compounds, including terpene hydrocarbons, acids, and aldehydes, as well as 83 polyphenolic compounds, mainly gallic acid derivatives, were positively identified. All samples showed a significant antioxidant activity by means of oxygen radical absorbance capacity, in line with their polyphenolic content and composition. Such findings set a solid ground to support the utilization of this plant as an attractive target for novel nutraceutical approaches and for drug discovery.
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Affiliation(s)
- Katia Arena
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (K.A.); (E.T.); (P.D.); (L.M.)
| | - Emanuela Trovato
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (K.A.); (E.T.); (P.D.); (L.M.)
| | - Francesco Cacciola
- Department of Biomedical, Dental, Morphological and Functional Imaging Sciences, University of Messina, 98125 Messina, Italy
| | - Ludovica Spagnuolo
- Department of Sciences and Technologies for Human and Environment, University Campus Bio-Medico of Rome, 00128 Rome, Italy; (L.S.); (E.P.); (L.D.)
| | - Elisa Pannucci
- Department of Sciences and Technologies for Human and Environment, University Campus Bio-Medico of Rome, 00128 Rome, Italy; (L.S.); (E.P.); (L.D.)
| | - Paolo Guarnaccia
- Department of Agriculture, Food Science and Environment (Di3A), University of Catania, 95124 Catania, Italy;
| | - Luca Santi
- Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, 01100 Viterbo, Italy;
| | - Paola Dugo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (K.A.); (E.T.); (P.D.); (L.M.)
- Chromaleont s.r.l., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy
| | - Luigi Mondello
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (K.A.); (E.T.); (P.D.); (L.M.)
- Department of Sciences and Technologies for Human and Environment, University Campus Bio-Medico of Rome, 00128 Rome, Italy; (L.S.); (E.P.); (L.D.)
- Chromaleont s.r.l., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy
| | - Laura Dugo
- Department of Sciences and Technologies for Human and Environment, University Campus Bio-Medico of Rome, 00128 Rome, Italy; (L.S.); (E.P.); (L.D.)
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19
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Liang L, Duan W, Zhao C, Zhang Y, Sun B. Recent Development of Two-Dimensional Liquid Chromatography in Food Analysis. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-021-02190-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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20
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Groeneveld G, Dunkle MN, Pursch M, Mes EP, Schoenmakers PJ, Gargano AF. Investigation of the Effects of Solvent-Mismatch and Immiscibility in Normal-Phase × Aqueous Reversed-Phase Liquid Chromatography. J Chromatogr A 2022; 1665:462818. [DOI: 10.1016/j.chroma.2022.462818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/28/2021] [Accepted: 01/07/2022] [Indexed: 11/28/2022]
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21
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Wicht K, Baert M, Muller M, Bandini E, Schipperges S, von Doehren N, Desmet G, de Villiers A, Lynen F. Comprehensive two-dimensional temperature-responsive × reversed phase liquid chromatography for the analysis of wine phenolics. Talanta 2022; 236:122889. [PMID: 34635268 DOI: 10.1016/j.talanta.2021.122889] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 11/18/2022]
Abstract
Phenolic compounds are an interesting class of natural products because of their proposed contribution to health benefits of foods and beverages and as a bio-source of organic (aromatic) building blocks. Phenolic extracts from natural products are often highly complex and contain compounds covering a broad range in molecular properties. While many 1D-LC and mass spectrometric approaches have been proposed for the analysis of phenolics, this complexity inevitably leads to challenging identification and purification. New insights into the composition of phenolic extracts can be obtained through online comprehensive two-dimensional liquid chromatography (LC × LC) coupled to photodiode array and mass spectrometric detection. However, several practical hurdles must be overcome to achieve high peak capacities and to obtain robust methods with this technique. In many LC × LC configurations, refocusing of analytes at the head of the 2D column is hindered by the high eluotropic strength of the solvent transferred from the 1D to the 2D, leading to peak breakthrough or broadening. LC × LC combinations whereby a purely aqueous mobile phase is used in the 1D and RPLC is used in the 2D are unaffected by these phenomena, leading to more robust methods. In this contribution, the combination of temperature-responsive liquid chromatography (TRLC) with RPLC is used for the first time for the analysis of phenolic extracts of natural origin to illustrate the potential of this alternative combination for natural product analyses. The possibilities of the combination are investigated through analysis of wine extracts by TRLC × RPLC-DAD and TRLC × RPLC-ESI-MS.
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Affiliation(s)
- Kristina Wicht
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium
| | - Mathijs Baert
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium
| | - Magriet Muller
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, ZA-7602, Matieland, South Africa
| | - Elena Bandini
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium
| | - Sonja Schipperges
- Agilent Technologies, Hewlett Packard St 8, D-76337, Waldbronn, Germany
| | - Norwin von Doehren
- Agilent Technologies, Netherlands BV, NL-4330, EA, Middelburg, Netherlands
| | - Gert Desmet
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, B-1050, Brussel, Belgium
| | - André de Villiers
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, ZA-7602, Matieland, South Africa
| | - Frederic Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium.
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22
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Moussa A, Lauer T, Stoll D, Desmet G, Broeckhoven K. Modelling of analyte profiles and band broadening generated by interface loops used in multi-dimensional liquid chromatography. J Chromatogr A 2021; 1659:462578. [PMID: 34700181 DOI: 10.1016/j.chroma.2021.462578] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/17/2021] [Accepted: 09/21/2021] [Indexed: 11/17/2022]
Abstract
Currently, the shape and variance of the analyte band entering the second dimension column when injected from an open loop interface in two-dimensional liquid chromatography is not fully understood. This is however important as it is connected to several other variables encountered when developing 2D-LC methods, including the first dimension flow rate, the sampling (modulation) time and the loop volume. Both numerical simulation methods and experimental measurements were used to understand and quantify the dispersion occurring in open tubular interface loops. Variables included are the analyte diffusion coefficient (Dmol), loop filling and emptying rates (Ffill & Fempty), loop inner diameter or radius (Rloop) and loop volume (Vloop). For a straight loop capillary, we find that the concentration profile (as measured at the loop outlet) depends only on a single dimensionless parameter tempty*=VloopFempty·DmolRloop2 and the ratio of the filling and emptying flow rates Fempty/Ffill. A model depending only on these two parameters was developed to predict of the peak variance resulting from the filling and emptying of a straight capillary operated in the first-in-last-out (FILO) modulation mode. Comparison of the concentration profiles and the corresponding variances obtained by either numerical simulation or experiments with straight capillaries shows the results generally agree very well. When the straight capillary is replaced by a tightly coiled loop, significantly smaller (20-40%) peak variances are observed compared to straight capillaries. The magnitude of these decreases is not predicted as well by simulations, however the simulation results are still useful in this case, because they represent an upper boundary (i.e., worst-case scenario) on the predicted variance.
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Affiliation(s)
- Ali Moussa
- Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium
| | - Thomas Lauer
- Gustavus Adolphus College, 800 West College Avenue, Saint Peter, MN, 56082, USA
| | - Dwight Stoll
- Gustavus Adolphus College, 800 West College Avenue, Saint Peter, MN, 56082, USA
| | - Gert Desmet
- Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium
| | - Ken Broeckhoven
- Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium.
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23
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Analytical Methods for Exploring Nutraceuticals Based on Phenolic Acids and Polyphenols. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11188276] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Phenolic compounds such as phenolic acids, flavonoids, and stilbenes comprise an enormous family of bioactive molecules with a range of positive properties, including antioxidant, antimicrobial, or anti-inflammatory effects. As a result, plant extracts are often purified to recover phenolic compound-enriched fractions to be used to develop nutraceutical products or dietary supplements. In this article, we review the properties of some remarkable plant-based nutraceuticals in which the active molecules are mainly polyphenols and related compounds. Methods for the characterization of these extracts, the chemical determination of the bioactivities of key molecules, and the principal applications of the resulting products are discussed in detail.
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