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Sartyoungkul S, Thaveesangsakulthai I, Cabello MKE, Kulsing C, Sakurai H. Application of cup-shaped trilactams for selective extraction of volatile compounds by gas chromatography-mass spectrometry. Analyst 2020; 145:6668-6676. [DOI: 10.1039/d0an01061h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Chiral cup-shaped trilactams were used as liquid phase extraction material of volatile organic compounds in perfume analyzed by SPME GC-MS. (+)-material showed higher selective chiral recognition with oxygenated and cyclic volatile compounds.
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Affiliation(s)
- Sitanan Sartyoungkul
- Division of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- Suita 565-0871
- Japan
| | | | | | - Chadin Kulsing
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok 10330
- Thailand
| | - Hidehiro Sakurai
- Division of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- Suita 565-0871
- Japan
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2
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Guerrero ML, Díaz AN, Sánchez FG, Corrall H. Chiral and Achiral Enantiomeric Separation of (±)-Alprenolol. OPEN CHEM 2019. [DOI: 10.1515/chem-2019-0049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThe chiral separation of enantiomers is crucial for pharmacovigilance within drug discovery. Although a large number of prescribed medications are marketed as pure enantiomers, this is not always the case and many are in fact racemic mixtures. Drug scandals, such as that of Thalidomide in 1961, provide a clear example of the social and economic repercussions that can be caused by negligence of these chiral compounds. Two high performance liquid chromatography (HPLC) methods are presented to determine, separate and quantitate a commonly prescribed chiral beta blocker, (-)-Alprenolol. The first method utilises a chiral column to physically separate the two enantiomers of Alprenolol in 25 minutes, before quantitating with two detectors. Fluorimetry gave the better limit of detection of 0.16-0.41ng and a correlation coefficient of 0.999. The second method used an achiral column coupled with polarimetry to quantitate (-)-Alprenolol without the need for physical separation in 10 minutes. The limit of detection achieved was 27-37μg and demonstrated a correlation coefficient of -0.999.
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Affiliation(s)
- M.M. López Guerrero
- Faculty of Sciences, University of Málaga, Av. Cervantes, 2, 29071Málaga, Spain
| | - A. Navas Díaz
- Faculty of Sciences, University of Málaga, Av. Cervantes, 2, 29071Málaga, Spain
| | - F. García Sánchez
- Faculty of Sciences, University of Málaga, Av. Cervantes, 2, 29071Málaga, Spain
| | - H. Corrall
- Faculty of Sciences, University of Málaga, Av. Cervantes, 2, 29071Málaga, Spain
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Kulsing C, Yang Y, Chowdhury JM, Boysen RI, Hearn MTW. Use of peak sharpening effects to improve the separation of chiral compounds with molecularly imprinted porous polymer layer open‐tubular capillaries. Electrophoresis 2017; 38:1179-1187. [DOI: 10.1002/elps.201600532] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 01/24/2017] [Accepted: 01/26/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Chadin Kulsing
- Australian Centre for Research on Separation Science (ACROSS), Australian Research Council Special Research Centre for Green Chemistry School of Chemistry Monash University Melbourne Victoria Australia
| | - Yuanzhong Yang
- Australian Centre for Research on Separation Science (ACROSS), Australian Research Council Special Research Centre for Green Chemistry School of Chemistry Monash University Melbourne Victoria Australia
| | - Jamil M. Chowdhury
- Australian Centre for Research on Separation Science (ACROSS), Australian Research Council Special Research Centre for Green Chemistry School of Chemistry Monash University Melbourne Victoria Australia
| | - Reinhard I. Boysen
- Australian Centre for Research on Separation Science (ACROSS), Australian Research Council Special Research Centre for Green Chemistry School of Chemistry Monash University Melbourne Victoria Australia
| | - Milton T. W. Hearn
- Australian Centre for Research on Separation Science (ACROSS), Australian Research Council Special Research Centre for Green Chemistry School of Chemistry Monash University Melbourne Victoria Australia
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Lomsadze K, Vega ED, Salgado A, Crego AL, Scriba GK, Marina ML, Chankvetadze B. Separation of enantiomers of norephedrine by capillary electrophoresis using cyclodextrins as chiral selectors: Comparative CE and NMR studies. Electrophoresis 2012; 33:1637-47. [DOI: 10.1002/elps.201200062] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ketevan Lomsadze
- Institute of Physical and Analytical Chemistry; School of Exact and Natural Sciences; Tbilisi State University; Tbilisi; Georgia
| | - Elena Domínguez Vega
- Department of Analytical Chemistry; Faculty of Chemistry; University of Alcalá; Madrid; Spain
| | - Antonio Salgado
- Department of Medicinal Chemistry; Centro Nacional de Investigaciones Oncológicas (CNIO); Madrid; Spain
| | - Antonio L. Crego
- Department of Analytical Chemistry; Faculty of Chemistry; University of Alcalá; Madrid; Spain
| | - Gerhard K.E. Scriba
- Department of Pharmaceutical Chemistry; Friedrich-Schiller-University Jena; Jena; Germany
| | - Maria Luisa Marina
- Department of Analytical Chemistry; Faculty of Chemistry; University of Alcalá; Madrid; Spain
| | - Bezhan Chankvetadze
- Institute of Physical and Analytical Chemistry; School of Exact and Natural Sciences; Tbilisi State University; Tbilisi; Georgia
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Huang L, Lin Q, Chen Y, Chen G. Transient isotachophoresis with field-amplified sample injection for on-line preconcentration and enantioseparation of some β-agonists. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2011; 3:294-298. [PMID: 32938027 DOI: 10.1039/c0ay00556h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Transient isotachophoresis with field-amplified sample injection (FASI), using β-CD as the chiral selector and tetrabutylammonium hydroxide (TBAOH) as the additive, was applied for on-line preconcentration and enantioseparation of three β-agonists, namely, cimaterol, clenbuterol and terbutaline. The experimental conditions for both simultaneous enantioseparation and on-line preconcentration methods have been investigated in detail. Under the optimum conditions, the detection limits (defined as S/N = 3) of this method were found to be 1 ng mL-1 for all three pairs of β-agonists enantiomers. Compared with conventional electrokinetic injection, the enhancement factors were greatly improved to be 250-fold. Finally, the proposed method has been applied for the analysis of human urine samples.
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Affiliation(s)
- Lu Huang
- Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Qi Lin
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Yiting Chen
- Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Guonan Chen
- Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
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6
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Yang J, Lu X, Pan L, Jiang K, Cheng M, Li F. Simultaneous enantioseparation of four β2-agonists by capillary electrophoresis with cyclodextrin additives. Study of the enantioselective mechanism. J Sep Sci 2008; 31:3749-54. [DOI: 10.1002/jssc.200800311] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Gotti R, Calleri E, Massolini G, Furlanetto S, Cavrini V. Penicillin G acylase as chiral selector in CE using a pullulan-coated capillary. Electrophoresis 2006; 27:4746-54. [PMID: 17080475 DOI: 10.1002/elps.200600194] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In the present study, penicillin G acylase (PGA), an enzyme belonging to the family of hydrolases, has been investigated as chiral selector in CE using the partial filling technique. Owing to the strong disposition of PGA to be adsorbed by the inner capillary wall, permanently coated capillaries were used to diminish both the protein-wall interactions and the EOF. In particular, the silica surface of the capillary was chemically coated by an antiadhesive and an hydrophilic layer of pullulan, a high-molecular-mass homopolysaccharide. The coating procedure consisted in the silanization with glycidoxypropyltrimethoxysilane and the subsequent coupling of the hydroxyl groups of pullulan onto the silanized capillary. Using this approach, a significant EOF suppression was obtained within a wide pH range (pH 3.0-9.0); this result was very important in order to find the suitable conditions for the application of partial filling technique. The optimization of partial filling was carried out by considering the effects of different experimental conditions (buffer pH, PGA concentration, and loading duration), on the migration time and enantioresolution of rac-ketoprofen. Under the selected conditions as: 100 mM sodium phosphate buffer (pH 5.5) containing 240 microM of PGA (partial filling of 120 s at a pressure of 50 mbar), a series of acidic compounds resulted to be enantioresolved in about 10 min. The long-term stability of the proposed coating was evaluated; more than 100 injections were performed without significant loss of reproducibility.
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Affiliation(s)
- Roberto Gotti
- Department of Pharmaceutical Sciences, University of Bologna, Bologna, Italy.
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Xu H, Yu X, Chen H. Enantiomeric Separation of Basic Drugs with Partially Filled Serum Albumin as Chiral Selector in Capillary Electrophoresis. ANAL SCI 2004; 20:1409-13. [PMID: 15524192 DOI: 10.2116/analsci.20.1409] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A reliable method is presented for the chiral separation of three basic drugs (mexiletine, chlorpheniramine and propranolol) with serum albumins (human and porcine, HSA and PSA) as chiral selectors by capillary electrophoresis in combination with the partial filling technique. Based on the systematic optimization of operation variables, the chiral separation of mexiletine, chlorpheniramine and propranolol was achieved in the pH 7.4 phosphate buffer by using HSA, PSA and PSA as selectors, respectively. The chiral recognition ability of HSA and PSA was compared. HSA and PSA show a different chiral recognition ability for each of the three drugs. In addition, the association constants between enantiomeric drugs and proteins were determined to be 2.00 and 3.80 x 10(2) M(-1) for mexiletine and HSA, 0.59 and 1.12 x 10(3) M(-1) for chlorpheniramine and PSA, and 0.87 and 1.42 x 10(3) M(-1) for propranolol and PSA. The method for the chiral separation and determination of association constants possesses the advantages of simple performance, effective avoiding of the interference of the UV detection from protein, and lowering of the reagent consumption.
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Affiliation(s)
- Hui Xu
- Institute of Analytical Science, Department of Chemistry, Nanjing University, Nanjing, P R China
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Abstract
This review article with 223 references describes recent developments in capillary electrophoresis (CE) of proteins and covers papers published during last two years, from the previous review (V. Dolnik, Electrophoresis 1999, 20, 3106-3115) through Spring 2001. It describes the topics related to CE of proteins including modeling of the electrophoretic properties of proteins, sample pretreatment, wall coatings, improving selectivity, detection, special electrophoretic techniques, and applications.
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Affiliation(s)
- V Dolnik
- Molecular Dynamics, Sunnyvale, CA 94085, USA.
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Abstract
A review is presented that surveys the basic theory of direct separation of enantiomers by capillary electrophoretic (CE) techniques. These separations are based on the formation of diastereomeric complexes between the enantiomeric analytes and a chiral selector added to the electrolyte solution. The review covers a comprehensive treatment of the equations needed for optimization of selectivity coefficients, resolution and analysis time in the zone electrophoretic mode. In this context, it takes into account combined equilibria of complexation and protonation/deprotonation as well as complexation and paritition into micelles. On the basis of these equations, the benefits of charged selectors and the optimization potential inherent to pH tuning can be documented. In addition, the review deals with some basic aspects of chiral isoelectric focusing and briefly discusses indirect enantioseparation. In a subsequent section a survey is given on particularfeatures of the various types of chiral selectors. Finally, the recent developments in preparative enantioseparation in continuous free-flow system and by use of isoelectric membranes are discussed.
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Affiliation(s)
- A Rizzi
- Institute of Analytical Chemistry, University of Vienna, Austria.
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