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Long W, You M, Li J, Wang Y, Wang D, Tao X, Rao L, Xia Z, Fu Q. Sulfonic Functionalized Polydopamine Coatings with pH-Independent Surface Charge for Optimizing Capillary Electrophoretic Separations. Molecules 2024; 29:1600. [PMID: 38611879 PMCID: PMC11013714 DOI: 10.3390/molecules29071600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 03/30/2024] [Accepted: 03/31/2024] [Indexed: 04/14/2024] Open
Abstract
Enhancing the pH-independence and controlling the magnitude of electroosmotic flow (EOF) are critical for highly efficient and reproducible capillary electrophoresis (CE) separations. Herein, we present a novel capillary modification method utilizing sulfonated periodate-induced polydopamine (SPD) coating to achieve pH-independent and highly reproducible cathodic EOF in CE. The SPD-coated capillaries were obtained through post-sulfonation treatment of periodate-induced PDA (PDA-SP) coatings adhered on the capillary inner surface. The successful immobilization of the SPD coating and the substantial grafting of sulfonic acid groups were confirmed by a series of characterization techniques. The excellent capability of PDA-SP@capillary in masking silanol groups and maintaining a highly robust EOF mobility was verified. Additionally, the parameters of sulfonation affecting the EOF mobilities were thoroughly examined. The obtained optimum SPD-coated column offered the anticipated highly pH-independent and high-strength cathodic EOF, which is essential for enhancing the CE separation performance and improving analysis efficiency. Consequently, the developed SPD-coated capillaries enabled successful high-efficiency separation of aromatic acids and nucleosides and rapid cyclodextrin-based chiral analysis of racemic drugs. Moreover, the SPD-coated columns exhibited a long lifetime and demonstrated good intra-day, inter-day, and column-to-column repeatability.
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Affiliation(s)
- Wenwen Long
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Mingyue You
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Jieli Li
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Yan Wang
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Dan Wang
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Xueping Tao
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Li Rao
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
| | - Zhining Xia
- School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Qifeng Fu
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
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2
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Luo C, Chen X, Li P, Huang C. A Photoelectrochemical Sensor Based on DNA Bio-Dots-Induced Aggregation of AuNPs for Methionine Detection. Molecules 2023; 28:7740. [PMID: 38067471 PMCID: PMC10707855 DOI: 10.3390/molecules28237740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 12/18/2023] Open
Abstract
Based on DNA bio-dots-induced aggregation of gold nanoparticles (AuNPs), a methionine (Met) photoelectrochemical (PEC) sensor with CS-GSH-CuNCs/TiO2 NPs as the photoelectric conversion element and AuNPs as the specific recognition element was constructed. First, a TiO2 NPs/ITO electrode and CS-GSH-CuNCs were prepared, and then the CS-GSH-CuNCs/TiO2 NPs/ITO photosensitive electrode was obtained by self-assembly. Next, DNA bio-dots were modified to the upper surface of the electrode using a coupling reaction to assemble the DNA bio-dots/CS-GSH-CuNCs/TiO2 NPs electrode. Amino-rich DNA bio-dots were used to induce the aggregation of AuNPs on the electrode surface via Au-N interactions and prepare the AuNPs/DNA bio-dots/CS-GSH-CuNCs/TiO2 NPs electrode. Due to the fluorescence resonance energy transfer (FRET) between CS-GSH-CuNCs and AuNPs, the complexation chance of electron-hole (e--h+) pair in CS-GSH-CuNCs increased, which, in turn, led to a decrease in photocurrent intensity. When Met was present, AuNPs aggregated on the electrode surface were shed and bound to Met since the Au-S interaction is stronger than the Au-N interaction, resulting in the recovery of the photocurrent signal. Under optimal conditions, the photocurrent intensity of the PEC sensor showed good linearity with the logarithm of Met concentration in the range of 25.0 nmol/L-10.0 μmol/L with the limit of detection (LOD) of 5.1 nmol/L (S/N = 3, n = 10).
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Affiliation(s)
- Chen Luo
- Xingzhi College, Zhejiang Normal University, Lanxi 321100, China;
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
| | - Xiaoxiao Chen
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
| | - Pu Li
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
| | - Chaobiao Huang
- Xingzhi College, Zhejiang Normal University, Lanxi 321100, China;
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
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3
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Yu YL, Shi MZ, Zhu SC, Cao J. Rapid stacking of amino acids in soybean and Dendrobium officinale by on-capillary sandwich derivatization in capillary electrophoresis. Food Res Int 2022; 162:112071. [DOI: 10.1016/j.foodres.2022.112071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/04/2022] [Accepted: 10/18/2022] [Indexed: 11/25/2022]
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4
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Klassen A, Fernandes RF, de Oliveira DC, do Nascimento MP, Borges MMC, de Oliveira MAL, Calixto LA, Borges KB. Short-End Injection Capillary Electrophoresis and Multivariate Analysis for Simultaneous Determination of Heavy Metals in Passiflora incarnata Tea. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15994. [PMID: 36498066 PMCID: PMC9735907 DOI: 10.3390/ijerph192315994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
An ultra-fast method for the simultaneous determination of heavy metals in Passiflora incarnata tea by capillary electrophoresis (CE) using a short-end injection combined with multivariate analysis was proposed. Separation was conducted by hydrodynamic injection (5 s at 0.5 psi) using the short-end injection procedure in a fused uncoated silica capillary (50 cm total length, 10.2 cm effective length, 50 µm i.d.) with separation time less than 2 min. An indirect UV detection at 214 nm was employed by using imidazole as a chromophore. The buffer used was 6 mmol/L hydroxybutyric acid (HIBA). The optimum conditions by full factorial with a central point were achieved by 18-crown-6 concentration (23.3 mmol L−1), voltage (+11.4 kV), methanol concentration (3.8%), and temperature (20 °C). The method showed good linearity (R2 > 0.998) for both Cd and Pb, inter-day precision of less than 14.49%, and an adequate limit of quantification only for Cd (LOQ < 0.5 µg mL−1 for Cd) based on the US Pharmacopeial Convention limit requirements for elemental impurities. After method validation, the method was applied to Passiflora incarnata tea samples from a local market. Furthermore, the developed method showed great potential for the determination of metals in other samples with proper sample preparation procedures.
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Affiliation(s)
- Aline Klassen
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Campus Diadema, Rua São Nicolau, 210, Centro, Diadema 09913-030, SP, Brazil
| | - Rafael Ferreira Fernandes
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Campus Diadema, Rua São Nicolau, 210, Centro, Diadema 09913-030, SP, Brazil
| | - Débora Cristina de Oliveira
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Campus Diadema, Rua São Nicolau, 210, Centro, Diadema 09913-030, SP, Brazil
| | - Maria Patrícia do Nascimento
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora (UFJF), Campus Universitário, Rua José Lourenço Kelmer, s/n, Martelos, Juiz de Fora 36036-900, MG, Brazil
| | - Marcella Matos Cordeiro Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei 36301-160, MG, Brazil
| | - Marcone Augusto Leal de Oliveira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora (UFJF), Campus Universitário, Rua José Lourenço Kelmer, s/n, Martelos, Juiz de Fora 36036-900, MG, Brazil
| | - Leandro Augusto Calixto
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Campus Diadema, Rua São Nicolau, 210, Centro, Diadema 09913-030, SP, Brazil
| | - Keyller Bastos Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei 36301-160, MG, Brazil
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5
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Mori M, Aoyagi K, Tomoda T, Ishikawara F, Sakamoto S, Myochin H, Kuga M, Kozaki D, Ohshima N, Izumi T, Itabashi H, Shoho Y, Yoshida A, Tsunekawa K, Kimura T, Murakami M. Simultaneous capillary electrophoresis of anions and cations in a single injection using an anion exchanger-modified capillary for determination of salivary ions in combination with statistical analyses. J Chromatogr A 2020; 1635:461647. [PMID: 33291035 DOI: 10.1016/j.chroma.2020.461647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 10/23/2022]
Abstract
This paper describes the simultaneous capillary electrophoresis (CE) of anions and cations using an anion exchange-modified capillary, which was prepared by chemical coating with a cationic silylating reagent, and its application to saliva analysis. The CE method provides high-throughput (5 min for a single sample injection) analysis by generating a high-velocity electroosmotic flow at pH 3.0-3.5. The detection limits at a signal-to-noise ratio of 3 ranged from 1.2 to 18 μM for anions and 1.0 to 2.7 μM for cations. The relative standard deviations for the migration times and peak areas of analytes (n = 4) ranged from 0.05% to 0.40% and 0.94% to 4.7%, respectively. The CE system was used to analyze 11 common ions in saliva samples collected from long-distance runners and sedentary university students before and after running for a set distance or a set time. Interestingly, the SCN- concentrations decreased in the saliva samples of all 14 athletes and 16 sedentary students after running. Furthermore, when the concentrations of the analyzed ions were compared with that of cortisol as a typical stress marker by multiple regression analysis, SCN- and NO3- in saliva samples from the two subject groups strongly correlated with cortisol levels, as determined by an electrochemiluminescence immunoassay. This study improves our knowledge of both the analytical methodology for CE and statistical methods for identifying common ions that could be used as physical stress markers.
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Affiliation(s)
- Masanobu Mori
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan.
| | - Keisuke Aoyagi
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Toshihiro Tomoda
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Fumi Ishikawara
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Shou Sakamoto
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Hironori Myochin
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Midori Kuga
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Daisuke Kozaki
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Noriyasu Ohshima
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takashi Izumi
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan; Faculty of Health Care, Teikyo Heisei University, 2-51-4, Higashiikebukuro, Toshima-ku, Tokyo, 170-8445, Japan
| | - Hideyuki Itabashi
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Yoshifumi Shoho
- Faculty of Education, Ikuei University, 1656-1, Kyoume-machi, Takasaki, Gunma 370-0011, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
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Khan SA, Choudhury R, Majumdar M, Nandi NB, Roy S, Misra TK. Gluconate‐Stabilized Silver Nanoparticles as pH Dependent Dual‐Nanosensor for Quantitative Evaluation of Methionine and Cysteine. ChemistrySelect 2020. [DOI: 10.1002/slct.202001654] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Shamim Ahmed Khan
- Department of ChemistryNational Institute of Technology Agartala Agartala Tripura 799046 India
| | - Rupasree Choudhury
- Department of ChemistryNational Institute of Technology Agartala Agartala Tripura 799046 India
| | - Moumita Majumdar
- Department of ChemistryNational Institute of Technology Agartala Agartala Tripura 799046 India
| | | | - Shaktibrata Roy
- Department of ChemistryNational Institute of Technology Agartala Agartala Tripura 799046 India
| | - Tarun Kumar Misra
- Department of ChemistryNational Institute of Technology Agartala Agartala Tripura 799046 India
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7
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Zhang H, Fu QF, Zheng GC, Yang FQ. Modulation of Electroosmotic Flow in Open Tubular Capillary Electrochromatography by Chitosan-Assisted Titanium Oxide Nanoparticles Liquid Phase Deposition. Chromatographia 2019. [DOI: 10.1007/s10337-019-03760-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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A photoelectrochemical sensing strategy based on single-layer MoS 2 modified electrode for methionine detection. J Pharm Biomed Anal 2018; 165:94-100. [PMID: 30522065 DOI: 10.1016/j.jpba.2018.11.059] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/27/2018] [Accepted: 11/27/2018] [Indexed: 01/18/2023]
Abstract
MoS2, a typical transition metal disulfide, is widely used in the photoelectrochemical (PEC) sensor construction. In general, MoS2 based PEC sensor are "signal-on" strategies. Surprisingly, we discovered that the PEC response of MoS2 was quenched by methionine greatly. Based on this discovery, a reduction PEC sensing strategy utilized MoS2 modified electrode for methionine detection was fabricated for the first time. Experimental factors, such as, bias potential, volume of MoS2 and pH were studied. Under optimized conditions, the decreased intensity of the photocurrent signal was proportional to the logarithmic value of methionine concentrations from 0.1 nM to 1 μM with the detection limit of 0.03 nM. Moreover, this method exhibited good performance of excellent selectivity. And it showed potential applications in the practical determination of methionine in real-life sample. This strategy not only expands the PEC detection method but also provides a simple, rapid response, good selectivity and high sensitivity way to detect methionine.
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9
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Yang TT, Wen BF, Liu K, Qin M, Gao YY, Ding DJ, Li WT, Zhang YX, Zhang WF. Cyclosporine A/porous quaternized chitosan microspheres as a novel pulmonary drug delivery system. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2018; 46:552-564. [PMID: 29688042 DOI: 10.1080/21691401.2018.1463231] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Ting-Ting Yang
- College of Pharmacy, Weifang Medical University, Weifang, Shandong, China
- Shandong New Time Pharmaceutical Co., Ltd, Linyi, Shandong, China
| | - Bao-Fang Wen
- College of Pharmacy, Weifang Medical University, Weifang, Shandong, China
- Department of Emergency, Heze Municipal Hospital, Heze, Shandong, China
| | - Kang Liu
- College of Pharmacy, Weifang Medical University, Weifang, Shandong, China
- Jewim Pharmaceutical (Shandong) Co., Taian, Shandong, China
| | - Meng Qin
- College of Pharmacy, Weifang Medical University, Weifang, Shandong, China
| | - Yuan-Yuan Gao
- College of Pharmacy, Weifang Medical University, Weifang, Shandong, China
| | - De-Jun Ding
- College of Pharmacy, Weifang Medical University, Weifang, Shandong, China
| | - Wen-Tong Li
- College of Clinical Medicine, Weifang Medical University, Weifang, Shandong, China
| | - Yun-Xiang Zhang
- Department of Pathology, Weifang People’s Hospital, Weifang, Shandong, China
| | - Wei-Fen Zhang
- College of Pharmacy, Weifang Medical University, Weifang, Shandong, China
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10
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Ramos-Payán M, Ocaña-Gonzalez JA, Fernández-Torres RM, Llobera A, Bello-López MÁ. Recent trends in capillary electrophoresis for complex samples analysis: A review. Electrophoresis 2017; 39:111-125. [PMID: 28791719 DOI: 10.1002/elps.201700269] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 07/17/2017] [Accepted: 07/24/2017] [Indexed: 01/21/2023]
Abstract
CE has been a continuously evolving analytical methodology since its first introduction in the 1980s of the last century. The development of new CE separation procedures, the coupling of these systems to more sensitive and versatile detection systems, and the advances in miniaturization technology have allowed the application of CE to the resolution of new and complex analytical problems, overcoming the traditional disadvantages associated with this method. In the present work, different recent trends in CE and their application to the determination of high complexity samples (as biological fluids, individual cells, etc.) will be reviewed: capillary modification by different types of coatings, microfluidic CE, and online microextraction CE. The main advantages and disadvantages of the different proposed approaches will be discussed with examples of most recent applications.
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Affiliation(s)
- María Ramos-Payán
- Department of Analytical Chemistry, Faculty of Chemistry, University of Seville, Seville, Spain
| | - Juan A Ocaña-Gonzalez
- Department of Analytical Chemistry, Faculty of Chemistry, University of Seville, Seville, Spain
| | | | - Andreu Llobera
- Carl Zeiss Vision GmbH, Technology & Innovation, Aalen, Germany
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Vitali L, Gonçalves S, Rodrigues V, Fávere VT, Micke GA. Development of a fast method for simultaneous determination of hippuric acid, mandelic acid, and creatinine in urine by capillary zone electrophoresis using polymer multilayer-coated capillary. Anal Bioanal Chem 2016; 409:1943-1950. [DOI: 10.1007/s00216-016-0142-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 11/28/2016] [Accepted: 12/09/2016] [Indexed: 10/20/2022]
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12
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Xie X, Chang F, Li X, Li M, Zhu Z. Investigation and application of photochemically induced direct UV detection of low or non-UV absorbing compounds by capillary electrophoresis. Talanta 2016; 162:362-367. [PMID: 27837841 DOI: 10.1016/j.talanta.2016.10.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 10/08/2016] [Indexed: 11/13/2022]
Abstract
Some low or non-UV absorbing compounds like amino acids might be accessible to direct UV detection by capillary electrophoresis (CE), due to the photochemical reaction in the detection window of the separation capillary under extremely strong alkaline conditions. However, with regards to the photochemical reaction procedure and the influencing factors in CE, no comprehensive studies have been done. Herein, two strategies were applied to investigate the photochemical reaction mechanism including the introduction of an additional UV lamp and the utilization of driving pressure. The former confirmed the occurrence of photolysis, while the latter solved the interference of electroosmotic flow (EOF). Furthermore, the online photochemical reaction and online preconcentration technique were combined to develop a rapid, simple and sensitive method for determination of seven essential amino acids (valine, leucine, phenylalanine, methionine, tryptophan, threonine and lysine). Eventually, the developed method was successfully applied to the analysis of real samples with good reproducibility and reliability. This novel and simple method, based on the photochemical reactions occurring in the detection window and coupling with online preconcentration techniques, shows a great potential for the rapid and sensitive detection of low or non-UV absorbing compounds.
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Affiliation(s)
- Xia Xie
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China
| | - Fengxia Chang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China
| | - Xin Li
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China
| | - Meixian Li
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China
| | - Zhiwei Zhu
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China.
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13
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Valese AC, Spudeit DA, Dolzan MD, Bretanha LC, Vitali L, Micke GA. High-Throughput Analysis of Lidocaine in Pharmaceutical Formulation by Capillary Zone Electrophoresis Using Multiple Injections in a Single Run. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2016; 2016:4126810. [PMID: 27069712 PMCID: PMC4812394 DOI: 10.1155/2016/4126810] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Revised: 01/20/2016] [Accepted: 01/21/2016] [Indexed: 06/05/2023]
Abstract
This paper reports the development of a subminute separation method by capillary zone electrophoresis in an uncoated capillary using multiple injection procedure for the determination of lidocaine in samples of pharmaceutical formulations. The separation was performed in less than a minute leading to doing four injections in a single run. The cathodic electroosmotic flow contributed to reducing the analyses time. The background electrolyte was composed of 20 mmol L(-1) 2-amino-2-(hydroxymethyl)-1,3-propanediol and 40 mmol L(-1) 2-(N-morpholino)ethanesulfonic acid at pH 6.1. The internal standard used was benzylamine. Separations were performed in a fused uncoated silica capillary (32 cm total length, 23.5 cm effective length, and 50 μm internal diameter) with direct UV detection at 200 nm. Samples and standards were injected hydrodynamically using 40 mbar/3 s interspersed with spacer electrolyte using 40 mbar/7 s. The electrophoretic system was operated under constant voltage of 30 kV with positive polarity on the injection side. The evaluation of some analytical parameters of the method showed good linearity (r (2) > 0.999), a limit of detection 0.92 mg L(-1), intermediate precision better than 3.2% (peak area), and recovery in the range of 92-102%.
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Affiliation(s)
- Andressa C. Valese
- Department of Food Science Technologies, Federal University of Santa Catarina, Florianopolis, SC, Brazil
| | - Daniel A. Spudeit
- Departamento de Química, CFM, UFSC, Campus Universitário, Trindade, CP 476, 88040-900 Florianópolis, SC, Brazil
| | - Maressa D. Dolzan
- Departamento de Química, CFM, UFSC, Campus Universitário, Trindade, CP 476, 88040-900 Florianópolis, SC, Brazil
| | - Lizandra C. Bretanha
- Department of Food Science Technologies, Federal University of Santa Catarina, Florianopolis, SC, Brazil
| | - Luciano Vitali
- Departamento de Química, CFM, UFSC, Campus Universitário, Trindade, CP 476, 88040-900 Florianópolis, SC, Brazil
| | - Gustavo A. Micke
- Departamento de Química, CFM, UFSC, Campus Universitário, Trindade, CP 476, 88040-900 Florianópolis, SC, Brazil
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14
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Self-assembled and covalently linked capillary coating of diazoresin and cyclodextrin-derived dendrimer for analysis of proteins by capillary electrophoresis. Talanta 2016; 152:76-81. [PMID: 26992496 DOI: 10.1016/j.talanta.2016.01.043] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 01/19/2016] [Accepted: 01/23/2016] [Indexed: 01/20/2023]
Abstract
Self-assembled and covalently linked capillary coatings of cyclodextrin-derived (CD) dendrimer were prepared using photosensitive diazoresin (DR) as a coupling agent. Layer by layer (LBL) self-assembled DR/CD-dendrimer coatings based on ionic bonding was fabricated first on the inner surface of capillary, and subsequently converted into covalent bonding after treatment with UV light through a unique photochemistry reaction of DR. Protein adsorption on the inner surface of capillary was suppressed by the DR/CD-dendrimer coating, and thus a baseline separation of lysozyme (Lys), myoglobin (Mb), bovine serum albumin (BSA) and ribonuclease A (RNase A) was achieved using capillary electrophoresis (CE). Compared with the bare capillary, the DR/CD-dendrimer covalently linked capillary coatings showed excellent protein separation performance with good stability and repeatability. Because of the replacement of highly toxic and moisture sensitive silane coupling agent by DR in the covalent coating preparation, this method may provide an environmentally friendly and simple way to prepare the covalently coated capillaries for CE.
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Poinsot V, Ong-Meang V, Gavard P, Couderc F. Recent advances in amino acid analysis by capillary electromigration methods, 2013-2015. Electrophoresis 2015; 37:142-61. [DOI: 10.1002/elps.201500302] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/19/2015] [Accepted: 08/19/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Véréna Poinsot
- Université Paul Sabatier, Université de Toulouse, Laboratoire des IMRCP; Toulouse Cedex France
| | - Varravaddheay Ong-Meang
- Université Paul Sabatier, Université de Toulouse, Laboratoire des IMRCP; Toulouse Cedex France
| | - Pierre Gavard
- Université Paul Sabatier, Université de Toulouse, Laboratoire des IMRCP; Toulouse Cedex France
| | - François Couderc
- Université Paul Sabatier, Université de Toulouse, Laboratoire des IMRCP; Toulouse Cedex France
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Tajik S, Taher MA, Beitollahi H, Hosseinzadeh R, Ranjbar M. Preparation, Characterization and Electrochemical Application of ZnS/ZnAl2S4Nanocomposite for Voltammetric Determination of Methionine and Tryptophan Using Modified Carbon Paste Electrode. ELECTROANAL 2015. [DOI: 10.1002/elan.201500423] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Methionine production—a critical review. Appl Microbiol Biotechnol 2014; 98:9893-914. [DOI: 10.1007/s00253-014-6156-y] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 10/09/2014] [Accepted: 10/12/2014] [Indexed: 12/31/2022]
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