1
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Ma González H, Almirall I, Alpízar J, de Oca RM, Cerdà V. Determination of Vitamin E in Spirulina Platensis Extracts and Photoprotective Creams by Multi-Syringe Chromatography (MSC) and High-Performance Liquid Chromatography (HPLC). ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1762629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Hilda Ma González
- Department of Pharmaceutical Technology and Quality Assurance, Institute of Food and Pharmaceutical Science, University of Havana, Havana, Cuba
| | - Ivone Almirall
- Department of Pharmaceutical Technology and Quality Assurance, Institute of Food and Pharmaceutical Science, University of Havana, Havana, Cuba
| | - Jesús Alpízar
- Department of Analytical Chemistry, School of Chemistry, University of Havana, Havana, Cuba
| | - Rodny Montes de Oca
- Antidopping Laboratory, National Institute of Sports, Physical Culture and Recreation (INDER), Cuba
| | - Víctor Cerdà
- Department of Chemistry, University of the Balearic Islands, Palma, Spain
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2
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Merey HA, El-Mosallamy SS, Hassan NY, El-Zeany BA. Validated Chromatographic Methods for Simultaneous Determination of Calcipotriol Monohydrate and Betamethasone Dipropionate in the Presence of Two Dosage Form Additives. J Chromatogr Sci 2019; 57:305-311. [PMID: 30615100 DOI: 10.1093/chromsci/bmy112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 11/24/2018] [Accepted: 12/04/2018] [Indexed: 11/13/2022]
Abstract
Two chromatographic methods were developed, optimized and validated for simultaneous determination of calcipotriol monohydrate (CPM) and betamethasone dipropionate (BMD) in the presence of two dosage form additives named; butylated hydroxytoluene (BHT) and alpha-tocopherol (TOCO). The proposed methods were accurate, sensitive and specific. The first method based on using aluminum thin-layer chromatographic plates precoated with silica gel GF254 as a stationary phase and chloroform-ethyl acetate-toluene (5:5:3, by volume) as a developing system. This was followed by densitometric measurement of the separated bands at 264 nm. Whereas the second method is RP-HPLC where OnyxMonolithic C18® column was used with a gradient profile using methanol, water and acetic acid at flow rate 2.0 mL min-1. Detection was carried out at 264 nm. The methods were validated according to ICH guidelines. The specificity of the developed methods was investigated by analyzing the pharmaceutical dosage form. The validity of the proposed methods was assessed using the standard addition technique. The obtained results were statistically compared with those obtained by the official methods, showing no significant difference with respect to accuracy and precision at P = 0.05.
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Affiliation(s)
- Hanan A Merey
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El Aini Post, Cairo, Egypt
| | - Sally S El-Mosallamy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El Aini Post, Cairo, Egypt
| | - Nagiba Y Hassan
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El Aini Post, Cairo, Egypt
| | - Badr A El-Zeany
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El Aini Post, Cairo, Egypt
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3
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Electrochemical sensor sensitive detection of chloramphenicol based on ionic-liquid-assisted synthesis of de-layered molybdenum disulfide/graphene oxide nanocomposites. J APPL ELECTROCHEM 2018. [DOI: 10.1007/s10800-018-1271-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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4
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Muhammad N, Rahman A, Younis MA, Subhani Q, Shehzad K, Cui H, Zhu Y. Porous SnO 2 nanoparticles based ion chromatographic determination of non-fluorescent antibiotic (chloramphenicol) in complex samples. Sci Rep 2018; 8:12327. [PMID: 30120273 PMCID: PMC6098012 DOI: 10.1038/s41598-018-29922-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 07/16/2018] [Indexed: 01/18/2023] Open
Abstract
Nowadays, there are rising concerns about the extensive use of the antibiotics such as chloramphenicol (CAP), has threatened the human life in the form of various vicious diseases. The limited selectivity and sensitivity of confirmatory techniques (UV and electrochemical) and non-fluorescence property of CAP make its determination a challenging task in the modern pharmaceutical analysis. In order to redeem the selective, sensitive and cost-effective fluorescence methodology, here by the dual role of synthesized porous SnO2 nanoparticles were exploited; (i) a porous sorbent in a µ-QuEChERS based sample preparation and as (ii) a stimulant for the transformation of non-fluorescent analytes namely CAP and p-nitrophenol (p-NP) into their respective fluorescent product. We report a green, simple, selective and cost effective ion chromatographic method for CAP sensitive determination in three complex matrices including milk, human urine and serum. The synthesized sorbent not only selectively adsorbed and degraded the matrix/interferences but also selectively reduced the non-fluorescent antibiotic CAP into a fluorescent species. This developed ion chromatographic method exhibited good selectivity, linearity (r2 ≥ 0.996) and limit of detection (LOD) was in the range 0.0201-0.0280 µg/kg. The inter- and intraday precisions were also satisfactory having a relative standard deviation (RSDs) less than 14.96% and excellent recoveries of CAP in the range of 78.3-100.2% were retrieved in various complex samples.
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Affiliation(s)
- Nadeem Muhammad
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, China
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, China
| | - Abdul Rahman
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, China
| | | | - Qamar Subhani
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, China
| | | | - Hairong Cui
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, China
| | - Yan Zhu
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, China.
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5
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Falavigna M, Škalko-Basnet N, Cavallari C, Pini A, Luppi B, di Cagno MP. Novel in situ gel-forming solid dosage form (gfSDF) prepared by the simple syringe-based moulding: A screening study. Eur J Pharm Sci 2017; 105:11-18. [PMID: 28483510 DOI: 10.1016/j.ejps.2017.05.008] [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: 03/08/2017] [Revised: 05/03/2017] [Accepted: 05/04/2017] [Indexed: 11/19/2022]
Abstract
The aim of this study was to prepare and optimize a novel type of in situ gel-forming solid dosage form (gfSDF) to be used in the treatment of mucosal/skin ulcerations. For this purpose, a simple but reliable syringe-based hot melt/moulding method was employed. Chloramphenicol (antibiotic) and ibuprofen (anti-inflammatory) were chosen as model active pharmaceutical ingredients (APIs) to be loaded into the gfSDFs. To optimize the formulations, the gfSDFs of different compositions were studied in terms of APIs release from the matrix, solid-state characteristics, gellification properties and gfSDFs resistance to mechanical stress. Release studies showed that both APIs were released at a constant rate at different pH (pH5 and 7.4, respectively) and the changes in the formulation composition affected the release behaviour. Differential scanning calorimetry (DSC) results evidenced the complete solubilization of both API in the solid matrix. Texture analysis showed that the gfSDFs were capable of swelling once in a contact with aqueous environment and that the textural properties changed extemporaneously from the solid to gel form. The gel formed after hydration exhibited high cohesiveness and adhesiveness, an indication of good mucoadhesion properties. Friability testing confirmed satisfactory physical strength for a solid dosage form.
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Affiliation(s)
- Margherita Falavigna
- Drug Transport and Delivery Research Group, Department of Pharmacy, University of Tromsø The Arctic University of Norway, Tromsø, Norway; Drug Delivery Research Group, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Nataša Škalko-Basnet
- Drug Transport and Delivery Research Group, Department of Pharmacy, University of Tromsø The Arctic University of Norway, Tromsø, Norway
| | - Cristina Cavallari
- Drug Delivery Research Group, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Andrea Pini
- Drug Delivery Research Group, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Barbara Luppi
- Drug Delivery Research Group, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Massimiliano Pio di Cagno
- Drug Transport and Delivery Research Group, Department of Pharmacy, University of Tromsø The Arctic University of Norway, Tromsø, Norway.
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6
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Lotfy HM, Hegazy MA, Rezk MR, Omran YR. Comparative study of novel versus conventional two-wavelength spectrophotometric methods for analysis of spectrally overlapping binary mixture. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 148:328-337. [PMID: 25909908 DOI: 10.1016/j.saa.2015.04.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 03/12/2015] [Accepted: 04/05/2015] [Indexed: 06/04/2023]
Abstract
Smart spectrophotometric methods have been applied and validated for the simultaneous determination of a binary mixture of chloramphenicol (CPL) and prednisolone acetate (PA) without preliminary separation. Two novel methods have been developed; the first method depends upon advanced absorbance subtraction (AAS), while the other method relies on advanced amplitude modulation (AAM); in addition to the well established dual wavelength (DW), ratio difference (RD) and constant center coupled with spectrum subtraction (CC-SS) methods. Accuracy, precision and linearity ranges of these methods were determined. Moreover, selectivity was assessed by analyzing synthetic mixtures of both drugs. The proposed methods were successfully applied to the assay of drugs in their pharmaceutical formulations. No interference was observed from common additives and the validity of the methods was tested. The obtained results have been statistically compared to that of official spectrophotometric methods to give a conclusion that there is no significant difference between the proposed methods and the official ones with respect to accuracy and precision.
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Affiliation(s)
- Hayam M Lotfy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt; Pharmaceutical Chemistry Department, Faculty of Pharmaceutical Sciences & Pharmaceutical Industries, Future University, 12311 Cairo, Egypt
| | - Maha A Hegazy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt
| | - Mamdouh R Rezk
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt
| | - Yasmin Rostom Omran
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt.
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7
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Hegazy MA, Lotfy HM, Rezk MR, Omran YR. Novel spectrophotometric determination of chloramphenicol and dexamethasone in the presence of non labeled interfering substances using univariate methods and multivariate regression model updating. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 140:600-613. [PMID: 25659506 DOI: 10.1016/j.saa.2014.12.098] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 12/16/2014] [Accepted: 12/28/2014] [Indexed: 06/04/2023]
Abstract
Smart and novel spectrophotometric and chemometric methods have been developed and validated for the simultaneous determination of a binary mixture of chloramphenicol (CPL) and dexamethasone sodium phosphate (DSP) in presence of interfering substances without prior separation. The first method depends upon derivative subtraction coupled with constant multiplication. The second one is ratio difference method at optimum wavelengths which were selected after applying derivative transformation method via multiplying by a decoding spectrum in order to cancel the contribution of non labeled interfering substances. The third method relies on partial least squares with regression model updating. They are so simple that they do not require any preliminary separation steps. Accuracy, precision and linearity ranges of these methods were determined. Moreover, specificity was assessed by analyzing synthetic mixtures of both drugs. The proposed methods were successfully applied for analysis of both drugs in their pharmaceutical formulation. The obtained results have been statistically compared to that of an official spectrophotometric method to give a conclusion that there is no significant difference between the proposed methods and the official ones with respect to accuracy and precision.
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Affiliation(s)
- Maha A Hegazy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt
| | - Hayam M Lotfy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt
| | - Mamdouh R Rezk
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt
| | - Yasmin Rostom Omran
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, 11562 Cairo, Egypt.
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8
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Hartwell SK, Kehling A, Lapanantnoppakhun S, Grudpan K. Flow Injection/Sequential Injection Chromatography: A Review of Recent Developments in Low Pressure with High Performance Chemical Separation. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.749487] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Sklenářová H, Chocholouš P, Koblová P, Zahálka L, Šatínský D, Matysová L, Solich P. High-resolution monolithic columns—a new tool for effective and quick separation. Anal Bioanal Chem 2012. [DOI: 10.1007/s00216-012-6561-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Fernández M, Forteza R, Cerdá V. Multisyringe Chromatography (MSC): An Effective and Low Cost Tool for Water-Soluble Vitamin Separation. ANAL LETT 2012. [DOI: 10.1080/00032719.2012.693139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Sangoi MDS, Wrasse-Sangoi M, de Oliveira PR, Todeschini V, Rolim CMB. RAPID SIMULTANEOUS DETERMINATION OF ALISKIREN AND HYDROCHLOROTHIAZIDE FROM THEIR PHARMACEUTICAL FORMULATIONS BY MONOLITHIC SILICA HPLC COLUMN EMPLOYING EXPERIMENTAL DESIGNS. J LIQ CHROMATOGR R T 2011. [DOI: 10.1080/10826076.2011.582910] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Maximiliano da Silva Sangoi
- a Faculty of Pharmacy , Laboratory of Research in Pharmaceutical Quality Control, Federal University of Rio Grande do Sul , Porto Alegre-RS, Brazil
| | - Micheli Wrasse-Sangoi
- b Department of Industrial Pharmacy , Federal University of Santa Maria , Santa Maria-RS, Brazil
| | - Paulo Renato de Oliveira
- c Department of Pharmaceutical Sciences , Federal University of Santa Catarina , Florianópolis-SC, Brazil
| | - Vítor Todeschini
- a Faculty of Pharmacy , Laboratory of Research in Pharmaceutical Quality Control, Federal University of Rio Grande do Sul , Porto Alegre-RS, Brazil
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Can NO. HPLC determination of cefprozil in tablets using monolithic and C18 silica columns. J Sep Sci 2011; 34:2223-31. [PMID: 21557474 DOI: 10.1002/jssc.201100170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 03/20/2011] [Accepted: 03/28/2011] [Indexed: 02/04/2023]
Abstract
Cefprozil (CPZ) is a second-generation semi-synthetic cephalosporin antibiotic that commonly exists as the mixture of Z and E diastereoisomers, at the ratio of approximately 9:1. A novel reversed-phase HPLC method for the determination of CPZ in tablets was described. The separation of CPZ diastereoisomers and caffeine (internal standard) was carried out by applying the same analytical and instrumental conditions on two stationary phases, which have different surface chemistries. The columns used in the study were monolithic silica Merck Chromolith Performance RP-18e and conventional C18 silica Phenomenex Synergi Hydro RP columns. In total, 10 μL aliquots of samples were injected into the system and eluted using water-acetonitrile (90:10, v/v) solution, which was pumped through the column at a flow rate of 1.0 mL/min. The analyte peaks were detected at 200 nm using diode array detector with high specificity. CPZ diastereoisomers and caffeine were measured within 13 min using the C18 column, whereas <5 min was required for the monolithic one. Validation studies were performed according to official recommendations. Value of a monolithic column for the assay of diastereoisomers in pharmaceutical tablets was evaluated for the first time and found as a powerful alternative to highly efficient C18 columns.
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Affiliation(s)
- Nafiz O Can
- Department of Analytical Chemistry, Faculty of Pharmacy, Anadolu University, Eskisehir, Turkey.
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13
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Björklund E, Maya F, Bak SA, Hansen M, Estela JM, Cerdá V. Possibilities and limitations of the sequential injection chromatography technique for the determination of anticoccidial agents in water, pharmaceutical formulations and feed. Microchem J 2011. [DOI: 10.1016/j.microc.2011.01.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Wang T, Tong J, Sun M, Chen L. Fast and selective extraction of chloramphenicol from soil by matrix solid-phase dispersion using molecularly imprinted polymer as dispersant. J Sep Sci 2011; 34:1886-92. [DOI: 10.1002/jssc.201100046] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2011] [Revised: 05/02/2011] [Accepted: 05/03/2011] [Indexed: 11/08/2022]
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15
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Advances in the analysis of steroid hormone drugs in pharmaceuticals and environmental samples (2004–2010). J Pharm Biomed Anal 2011; 55:728-43. [DOI: 10.1016/j.jpba.2010.11.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Revised: 11/09/2010] [Accepted: 11/09/2010] [Indexed: 12/31/2022]
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16
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Kowalski D, Poboży E, Trojanowicz M. Flow-injection preconcentration of chloramphenicol using molecularly imprinted polymer for HPLC determination in environmental samples. JOURNAL OF AUTOMATED METHODS & MANAGEMENT IN CHEMISTRY 2011; 2011:143416. [PMID: 21584273 PMCID: PMC3092492 DOI: 10.1155/2011/143416] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2010] [Revised: 12/27/2010] [Accepted: 01/27/2011] [Indexed: 05/12/2023]
Abstract
The residue of antibiotic chloramphenicol (CAP) is important issue for food quality control and also for the environmental monitoring. It is banned for use in food-producing animals and has very limited use in human medicine, because of its severe impact on human health. Determination of trace level of CAP in environmental samples requires a very sensitive analytical method and efficient preconcentration procedure. CAP can be efficiently preconcentrated in flow-injection system using flow-through reactor packed with molecularly imprinted polymer (MIP), but determination of CAP in eluate from MIP requires the application of chromatographic separation, which was made in reversed-phase HPLC system with UV detection. In optimized conditions the limit of detection for 100 mL sample in HPLC with offline preconcentration on MIP was evaluated as 0.66 mg/L. In hyphenated FIA-HPLC system with zone sampling the LOD for developed method was evaluated as 15 ng/L, which indicates the possibility of using it for analysis of environmental samples.
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Affiliation(s)
- Damian Kowalski
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Ewa Poboży
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Marek Trojanowicz
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
- *Marek Trojanowicz:
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Samanidou VF, Karageorgou EG. On the use of Kinetex™-C18 core-shell 2.6 µm stationary phase to the multiclass determination of antibiotics. Drug Test Anal 2010; 3:234-44. [DOI: 10.1002/dta.218] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Revised: 09/29/2010] [Accepted: 09/29/2010] [Indexed: 11/09/2022]
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18
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Gu C, He J, Jia J, Fang N, Shamsi SA. Surfactant-bound monolithic columns for CEC. Electrophoresis 2010; 30:3814-27. [PMID: 19885887 DOI: 10.1002/elps.200900434] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A novel anionic surfactant bound monolithic stationary phase based on 11-acrylaminoundecanoic acid is designed for CEC. The monolith possessing bonded undecanoyl groups (hydrophobic sites) and carboxyl groups (weak cationic ion-exchange sites) were evaluated as a mixed-mode stationary phase in CEC for the separation of neutral and polar solutes. Using a multivariate D-optimal design the composition of the polymerization mixture was modeled and optimized with five alkylbenzenes and seven alkyl phenyl ketones as test solutes. The D-optimal design indicates a strong dependence of electrochromatographic parameters on the concentration of 11-acrylaminoundecanoic acid monomer and porogen (water) in the polymerization mixture. A difference of 6, 8 and 13% RSD between the predicted and the experimental values in terms of efficiency, resolution and retention time, respectively, indeed confirmed that the proposed approach is practical. The physical (i.e. morphology, porosity and permeability) and chromatographic properties of the monolithic columns were thoroughly investigated. With the optimized monolithic column, high efficiency separation of N-methylcarbamates pesticides and positional isomers was successfully achieved. It appears that this type of mixed-mode monolith (containing both chargeable and hydrophobic sites) may have a great potential as a new generation of CEC stationary phase.
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Affiliation(s)
- Congying Gu
- Department of Chemistry, Center for Biotechnology and Drug Design, Georgia State University, Atlanta, GA 30303, USA
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Gu C, He J, Jia J, Fang N, Simmons R, Shamsi SA. Surfactant-bound monolithic columns for separation of proteins in capillary high performance liquid chromatography. J Chromatogr A 2010; 1217:530-9. [PMID: 20031139 PMCID: PMC3098612 DOI: 10.1016/j.chroma.2009.11.082] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2009] [Accepted: 11/25/2009] [Indexed: 10/20/2022]
Abstract
A surfactant-bound monolithic stationary phase based on the co-polymerization of 11-acrylamino-undecanoic acid (AAUA) is designed for capillary high performance liquid chromatography (HPLC). Using D-optimal design, the effect of the polymerization mixture (concentrations of monomer, crosslinker and porogens) on the chromatographic performance (resolution and analysis time) of the AAUA-EDMA monolithic column was evaluated. The polymerization mixture was optimized using three proteins as model test solutes. The D-optimal design indicates a strong dependence of chromatographic parameters on the concentration of porogens (1,4-butanediol and water) in the polymerization mixture. Optimized solutions for fast separation and high resolution separation, respectively, were obtained using the proposed multivariate optimization. Differences less than 6.8% between the predicted and the experimental values in terms of resolution and retention time indeed confirmed that the proposed approach is practical. Using the optimized column, fast separation of proteins could be obtained in 2.5 min, and a tryptic digest of myoglobin was successfully separated on the high resolution column. The physical properties (i.e., morphology, porosity and permeability) of the optimized monolithic column were thoroughly investigated. It appears that this surfactant-bound monolith may have a great potential as a new generation of capillary HPLC stationary phase.
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Affiliation(s)
- Congying Gu
- Department of Chemistry, Center for Biotechnology and Drug Design, Georgia State University, Atlanta, GA 30303, USA
| | - Jun He
- Department of Chemistry, Center for Biotechnology and Drug Design, Georgia State University, Atlanta, GA 30303, USA
| | - Jinping Jia
- Department of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Nenghu Fang
- Department of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Robert Simmons
- Department of Chemistry, Center for Biotechnology and Drug Design, Georgia State University, Atlanta, GA 30303, USA
| | - Shahab A. Shamsi
- Department of Chemistry, Center for Biotechnology and Drug Design, Georgia State University, Atlanta, GA 30303, USA
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González-San Miguel H, Fernández M, Estela J, Cerdà V. Contribution of multi-commuted flow analysis combined with monolithic columns to low-pressure, high-performance chromatography. Trends Analyt Chem 2009. [DOI: 10.1016/j.trac.2008.11.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Implementing stepwise solvent elution in sequential injection chromatography for fluorimetric determination of intracellular free amino acids in the microalgae Tetraselmis gracilis. Anal Chim Acta 2008; 628:123-32. [DOI: 10.1016/j.aca.2008.08.030] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Revised: 08/19/2008] [Accepted: 08/21/2008] [Indexed: 11/23/2022]
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22
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Multi-syringe chromatography (MSC) system for the on-line solid-phase extraction and determination of hydrochlorothiazide and losartan potassium in superficial water, groundwater and wastewater outlet samples. J Pharm Biomed Anal 2008; 48:212-7. [DOI: 10.1016/j.jpba.2008.05.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2007] [Revised: 05/07/2008] [Accepted: 05/09/2008] [Indexed: 11/22/2022]
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23
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Simultaneous determination of hydrochlorothiazide and losartan potassium in tablets by high-performance low-pressure chromatography using a multi-syringe burette coupled to a monolithic column. Anal Bioanal Chem 2008; 391:2349-56. [DOI: 10.1007/s00216-008-2172-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2007] [Revised: 04/10/2008] [Accepted: 04/30/2008] [Indexed: 10/22/2022]
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Modulation of mobile phase composition in flow-injection/sequential-injection chromatography exploiting multisyringe flow analysis. Anal Bioanal Chem 2008; 391:817-25. [DOI: 10.1007/s00216-008-1848-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2007] [Revised: 12/10/2007] [Accepted: 01/08/2008] [Indexed: 10/22/2022]
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Pena A, Chmielova D, Lino CM, Solich P. Determination of fluoroquinolone antibiotics in surface waters from Mondego River by high performance liquid chromatography using a monolithic column. J Sep Sci 2007; 30:2924-8. [DOI: 10.1002/jssc.200700363] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gómez V, Miró M, Callao MP, Cerdà V. Coupling of Sequential Injection Chromatography with Multivariate Curve Resolution-Alternating Least-Squares for Enhancement of Peak Capacity. Anal Chem 2007; 79:7767-74. [PMID: 17854160 DOI: 10.1021/ac071202h] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Flow-through low-pressure chromatographic separations capitalized on the sequential injection chromatographic (SIC) concept are for the first time coupled to second-order multivariate regression models based on multivariate curve resolution-alternating least-squares (MCR-ALS) for outperforming current chromatographic methods in terms of resolution efficiency. The proposed SIC-MCR-ALS method involving sequential injection separation on short monolithic columns along with isocratic elution fosters ultrafast reversed-phase separations of complex multicomponent mixtures regardless of peak overlapping and retention parameters. The ruggedness of SIC systems is enhanced by removing the solenoid valves from the flow network, thus diminishing the column back pressure effects. As a consequence, the flow setup admitted mobile-phase flow rates much higher than those traditionally enabled in SIC. To ascertain the improved peak capacity of the SIC-MCR-ALS procedure, five phenolic species commonly used in disinfectant products and featuring similar UV spectra and close retention times in short reversed-phase silica-based monolithic phases are selected as model compounds and determined in just 1 min using mobile-phase flow rates of >or=2 mL min(-1). Notwithstanding the fact that the five phenolic derivatives coelute in a single chromatographic band, thus rendering resolution values ranging from 0.05 to 1.11, the concentration profiles and the pure spectra of each individual phenol species could be concurrently obtained. Quantitative validation of the chromatographic-chemometric method demonstrated both the reliability of the results and the enhanced resolution of mixtures with regard to former SIC systems with no need for thorough optimization of the separation conditions.
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Affiliation(s)
- Verónica Gómez
- Department of Analytical and Organic Chemistry, Rovira i Virgili University, Marcel.lí Domingo s/n Campus Sescelades, E-43007 Tarragona, Spain
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Chocholous P, Solich P, Satínský D. An overview of sequential injection chromatography. Anal Chim Acta 2007; 600:129-35. [PMID: 17903474 DOI: 10.1016/j.aca.2007.02.018] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2006] [Revised: 01/05/2007] [Accepted: 02/08/2007] [Indexed: 11/23/2022]
Abstract
New generation of sequential injection analysis (SIA) called sequential injection chromatography (SIC) has already been consolidated as a good alternative of high performance liquid chromatography (HPLC) for fast analysis of simple samples. Benefits of flow methods are automation, miniaturization and low sample and mobile phase consumption. Implementation of short monolithic chromatographic column into SIA opens new area-on-line chromatographic separation of multi-compound sample in low-pressure flow system, with the advantage of flow programming and possibility of sample manipulation. In the presented review the potential of SIC and its comparison with HPLC for determination of pharmaceutical mixtures is discussed and outlines past and recent trends focused on separation with SIC.
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Affiliation(s)
- Petr Chocholous
- Department of Analytical Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
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