1
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Fabrication of bisferrocenyl derivative grafted HTPB with high iron content and its application in dopamine detection. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121789] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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2
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Nehru R, Chen SM. Carbon supported olivine type phosphate framework: a promising electrocatalyst for sensitive detection of dopamine. RSC Adv 2018; 8:27775-27785. [PMID: 35542711 PMCID: PMC9083883 DOI: 10.1039/c8ra05034a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 07/13/2018] [Indexed: 12/11/2022] Open
Abstract
In this study, a layered olivine-type LiMnPO4/functionalized-multiwall carbon nanotube (f-MWCNTs) composite is used as an electrochemically active material for the real-time detection of dopamine. A wet-chemical ultrasonication process is used to combine LiMnPO4 with f-MWCNTs at room temperature. The composite was subjected to various structural, morphological and electrochemical studies. The blending of olivine-type LiMnPO4 into the f-MWCNTs is revealed by TEM analysis. The electrochemical activities of the LiMnPO4/f-MWCNTs composite are systematically investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) for the real-time detection of dopamine. Furthermore, the applicability of the as prepared LiMnPO4/f-MWCNTs composite was extended for the detection of human serum (E48) and rat brain-serum (C7) samples with satisfactory recoveries for the real-time applications. All these studies revealed that the layered olivine-type LiMnPO4/f-MWCNTs composite is a potential candidate in the field of electrochemical sensing.
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Affiliation(s)
- Raja Nehru
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology Taipei 10608 Taiwan
| | - Shen-Ming Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology Taipei 10608 Taiwan
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3
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Sakthinathan S, Chen SM, Liao WC. Multiwalled carbon nanotube supported Schiff base copper complex inorganic nanocomposite for enhanced electrochemical detection of dopamine. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00002b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A MWCNT/[Cu(sal-ala)bpy] inorganic nanocomposite for the electrochemical detection of dopamine (DA).
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Affiliation(s)
- Subramanian Sakthinathan
- Electroanalysis and Bioelectrochemistry Lab
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei 106
- Republic of China
| | - Shen-Ming Chen
- Electroanalysis and Bioelectrochemistry Lab
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei 106
- Republic of China
| | - Wei Cheng Liao
- Electroanalysis and Bioelectrochemistry Lab
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei 106
- Republic of China
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4
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Gowda JI, Buddanavar AT, Nandibewoor ST. Fabrication of multiwalled carbon nanotube-surfactant modified sensor for the direct determination of toxic drug 4-aminoantipyrine. J Pharm Anal 2015; 5:231-238. [PMID: 29403936 PMCID: PMC5762206 DOI: 10.1016/j.jpha.2015.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 01/07/2015] [Accepted: 01/07/2015] [Indexed: 12/04/2022] Open
Abstract
A multi-walled carbon nanotube (MWCNT)-cetyltrimethylammonium bromide (CTAB) surfactant composite modified glassy carbon electrode (GCE) was developed as a novel system for the determination of 4-aminoantipyrine(AAP). The oxidation process was irreversible over the pH range studied and exhibited a diffusion controlled behavior. All experimental parameters were optimized. The combination of MWCNT-CTAB endows the biosensor with large surface area, good biological compatibility, electricity and stability, high selectivity and sensitivity. MWCNT-CTAB/GCE electrode gave a linear response for AAP from 5.0×10−9 to 4.0×10−8 M with a detection limit of 1.63×10−10 M. The modified electrode showed good selectivity against interfering species and also exhibited good reproducibility. The present electrochemical sensor based on the MWCNT-CTAB/GCE electrode was applied to the determination of AAP in real samples.
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Affiliation(s)
- Jayant I Gowda
- P.G. Department of Studies in Chemistry, Karnatak University, Dharwad 580003, India
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5
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Bahga SS, Santiago JG. Coupling isotachophoresis and capillary electrophoresis: a review and comparison of methods. Analyst 2013; 138:735-54. [DOI: 10.1039/c2an36150g] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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6
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Sánchez ME, Rabanal B, Otero M, Martín‐Villacorta J. Solid‐Phase Extraction for the Determination of Dimethoate in Environmental Water and Soil Samples by Micellar Electrokinetic Capillary Chromatography (MEKC). J LIQ CHROMATOGR R T 2011. [DOI: 10.1081/jlc-120017901] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- M. E. Sánchez
- a Department of Chemical Engineering , Natural Resources Institute, University of León , León , Spain
| | - B. Rabanal
- b Instrumental Techniques Laboratory , University of León , León , Spain
| | - M. Otero
- a Department of Chemical Engineering , Natural Resources Institute, University of León , León , Spain
| | - J. Martín‐Villacorta
- c Department of Physical Chemistry and E. G. Chemistry Physical , University of León , Campus de Vegazana s/n, 24071‐León, Spain
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7
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N-Nitrosamines. ACTA ACUST UNITED AC 2009. [DOI: 10.1201/9781420027983.ch12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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8
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Dabek-Zlotorzynska E, Celo V, Yassine MM. Recent advances in CE and CEC of pollutants. Electrophoresis 2008; 29:310-23. [DOI: 10.1002/elps.200700510] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Filho PJS, Rios A, Valcárcel M, Caramao EB. Development of a new method for the determination of nitrosamines by micellar electrokinetic capillary chromatography. WATER RESEARCH 2003; 37:3837-3842. [PMID: 12909101 DOI: 10.1016/s0043-1354(03)00347-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A new method was developed for separation and quantification of nitrosamines by micellar electrokinetic capillary chromatography (MEKC). The effects of composition of the buffer, concentration of sodium dodecyl sulfate (SDS), gamma-cyclodextrin (CD) and pH on the separation and migration times of the nitrosamines were investigated. The different instrumental variables affecting sensitivity and resolution, such as power supply, injection mode and wavelength for measurement, were carefully optimized. The direct application of this method to aqueous synthetic samples allowed the separation and determination of nitrosamine mixtures at the mg x L(-1) level. The calibration curves revealed a linear range between 0.25 and 10 mg x L(-1), with detection limit (DL) varying from 0.16 to 0.27 mg x L(-1), quantification limit (QL) varying from 0.52 to 0.90 mg x L(-1), and RSD relative standard deviation (RSD) from 4.5% to 8.5%. The proposed method was successfully applied to the determination of dimethylnitrosamine (DMN), diethylnitrosamine (DEN), N-nitrosopyrrolidine (NPYR), N-nitrosomorpholine (NMOR) and N-nitrosopiperidine (NPIP).
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Affiliation(s)
- Pedro José Sanches Filho
- Centro Federal de Educação Tecnológica--RS--Curso de Qui;mica, Praça Vinte de Setembro 455, CEP 96015-360, Pelotas RS, Brazil
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10
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Sanches Filho PJ, Rios A, Valcárcel M, Zanin KD, Caramão EB. Determination of nitrosamines in preserved sausages by solid-phase extraction-micellar electrokinetic chromatography. J Chromatogr A 2003; 985:503-12. [PMID: 12580519 DOI: 10.1016/s0021-9673(02)01825-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new methodology for extraction, pre-concentration and analysis of nitrosamines in meat derived products was developed. The samples (canned sausages) were distilled in vacuum steam and the nitrosamines were pre-concentrated by solid-phase extraction with active carbon. Then, micellar electrokinetic chromatography was used for the separation and determination of the different nitrosamines contained in a real sample and gas chromatography with mass spectrometry detection was used as the confirmation technique. The method allowed the determination of nitrosamine compounds at trace levels with relative standard deviation ranging from 4.0 to 22%.
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Affiliation(s)
- Pedro José Sanches Filho
- Centro Federal de Educação Tecnológica-RS-Curso de Química, Praça Vinte de Setembro 455, CEP 96015-360, Pelotas, RS, Brazil
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11
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Turnes Carou MI, López Mahía P, Muniategui Lorenzo S, Fernández Fernández E, Prada Rodríguez D. Capillary zone electrophoresis for the determination of light-absorbing anions in environmental samples. J Chromatogr A 2001; 918:411-21. [PMID: 11407588 DOI: 10.1016/s0021-9673(01)00763-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A rapid and simple method for separation and determination of inorganic anions by capillary zone electrophoresis was described. The detection was carried out directly with a diode array detector. The experimental conditions, such as concentration of carrier electrolyte, capillary length, voltage, and temperature were optimized. In order to improve selectivity, different organic modifiers were also investigated. The baseline separation of 10 light-absorbing anions was accomplished within 3.5 min with a background electrolyte consisting of 50 mM sodium tetraborate containing 5% MeOH. Linear plots were obtained in the concentration range of 0.1-10 microg/ml. With sample stacking injection, the quantitation limits of the anions were found to be in the range of 0.02-0.1 microg/ml. The proposed method was successfully applied to the determination of inorganic anions in environmental samples and in effluents of a power plant.
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Affiliation(s)
- M I Turnes Carou
- Department of Analytical Chemistry, University of A Coruña, Spain
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12
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Dabek-Zlotorzynska E, Piechowski M, McGrath M, Lai EP. Determination of low-molecular-mass carboxylic acids in atmospheric aerosol and vehicle emission samples by capillary electrophoresis. J Chromatogr A 2001; 910:331-45. [PMID: 11261728 DOI: 10.1016/s0021-9673(00)01244-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A method is developed for the determination of a large number of airborne and vehicle-emitted low-molecular-mass mono- and dicarboxylic acids using capillary electrophoresis with indirect UV detection. A background electrolyte (BGE) consisting of 2,6-naphthalenedicarboxylic acid and tetradecylmethylammonium bromide, adjusted to pH 6.2 with 2,2-bis(hydroxymethyl)-2,2',2"-nitrilotriethanol, is employed. Separations are robust using the buffered BGE, proper rinse steps, and constant current mode with migration time variations less than 3% RSD on a day-to-day basis, using different capillaries and performed by different analysts. Detection limits are at the tens of microg/l level using pressure injection. A comparison of the CE method with ion chromatography is also made.
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Affiliation(s)
- E Dabek-Zlotorzynska
- Analysis and Air Quality Division, Environmental Technology Centre, Environment Canada, Ottawa, Ontario.
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13
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Chapter 6 Phenols. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s1567-7192(01)80009-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
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14
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Affiliation(s)
- Sahori TAKEDA
- Special Division for Green Life Technology, AIST Kansai, National Institute of Advanced Industrial Science and Technology
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15
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Ebber A. Separation of oil shale phenols by capillary zone electrophoresis and micellar electrokinetic chromatography. Chromatographia 2001. [DOI: 10.1007/bf02490347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Martínez D, Cugat MJ, Borrull F, Calull M. Solid-phase extraction coupling to capillary electrophoresis with emphasis on environmental analysis. J Chromatogr A 2000; 902:65-89. [PMID: 11192162 DOI: 10.1016/s0021-9673(00)00839-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This article reviews the status of solid-phase extraction (SPE) coupled with capillary electrophoresis (CE). It focuses on some of the organic pollutants which have captured the interest of analytical chemists--phenols, surfactants, dyes, polynuclear aromatic hydrocarbons (PAHs), aromatic and aliphatic amines, aromatic acids and aromatic sulfonic acids--and, in particular, on monitoring pesticides from different sources. It shows that the coupling of SPE to CE has considerable potential in the analysis of environmental pollutants.
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Affiliation(s)
- D Martínez
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Tarragona, Spain
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17
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Pedersen-Bjergaard S, Rasmussen KE, Halvorsen TG. Liquid-liquid extraction procedures for sample enrichment in capillary zone electrophoresis. J Chromatogr A 2000; 902:91-105. [PMID: 11192163 DOI: 10.1016/s0021-9673(00)00738-x] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This review article presents an overview of applications of liquid-liquid extraction (LLE) for analyte enrichment and clean-up of samples prior to capillary zone electrophoresis (CZE). The basic principles of LLE are discussed with special emphasis on analyte enrichment. In addition, attention is focused on the requirements for the final extract to be compatible with CZE. The paper discusses selected examples from the literature with special emphasis on detection limits in drug analysis and in environmental chemistry. Finally, the paper focus on alternative liquid-phase extraction concepts based on electroextraction, supported liquid membranes, and liquid-phase microextraction.
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18
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Asthana A, Bose D, Durgbanshi A, Sanghi SK, Kok WT. Determination of aromatic amines in water samples by capillary electrophoresis with electrochemical and fluorescence detection. J Chromatogr A 2000; 895:197-203. [PMID: 11105862 DOI: 10.1016/s0021-9673(00)00522-7] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Two capillary electrophoresis methods have been compared for the determination of aniline derivatives in environmental water samples. With the first method the anilines were separated as cations by free zone electrophoresis at low pH, and detected by amperometry. For this, the separation capillary was connected through a palladium field decoupler to an electrochemical detection cell which had been modified to match the volume scale of the separation. Most anilines tested, except chlorinated compounds, could be detected with full sensitivity at a detection potential of +0.7 V. Detection limits with this detection scheme were on a low microg/l level. The alternative method involved the derivatization of the anilines with fluorescamine, the separation of the derivatives formed by micellar electrokinetic chromatography, and fluorescence detection. For detection a lamp-based, fibre optics instrument was used. Detection limits with fluorimetry were comparable with those obtained with amperometric detection (in the order of 1 microg/l). Still, this method was preferred since it gave a higher separation efficiency and shorter analysis times (approximately 4 min). The most important argument, however, was its higher reliability and ease-of-handling. Preliminary experiments with water samples collected in areas where pollution with anilines may be expected showed that the method is highly specific, with few interferences showing up in the electropherograms.
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Affiliation(s)
- A Asthana
- Laboratory for Analytical Chemistry, University of Amsterdam, Netherlands
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19
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Oguri S. Electromigration methods for amino acids, biogenic amines and aromatic amines. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2000; 747:1-19. [PMID: 11103896 DOI: 10.1016/s0378-4347(00)00092-x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Methods of electromigration in laboratory apparatus of small-bore size have recently undergone development at a remarkably rapid pace, leading to a variety of new analytical techniques. One such technique is called "capillary electrophoresis" (CE), which is further classified on the basis of electromigration mode, viz., "capillary zone electrophoresis" (CZE), which, in turn, has several variations. This review aims to give a short overview of the various electromigration methods for amino compounds by using CE. Firstly, this review briefly summarizes the detection methods employed for detection of monoamines and polyamines by CE for both native and derivative forms. Next, current CE methods are described, and their applications to detection of amino acids, biogenic amines, aromatic amines, including heteroaromatic amines and their enantiomers, are introduced from representative papers. Finally, new methods for single-cell analysis and microchip CE techniques are focused on.
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Affiliation(s)
- S Oguri
- Department of Home Economics, Aichi-Gakusen University, Okazaki City, Japan
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20
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Menzinger F, Schmitt-Kopplin P, Freitag D, Kettrup A. Analysis of agrochemicals by capillary electrophoresis. J Chromatogr A 2000; 891:45-67. [PMID: 10999624 DOI: 10.1016/s0021-9673(00)00567-7] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
An increasing amount of articles using capillary electrophoresis as an investigation tool for pesticides and environmental pollutants were found over the last few years in analytical chemistry oriented journals. This review covers a wide literature range of the 1990s and concentrates on the analysis of organic agrochemicals (herbicides, fungicides, insecticides, acaricides, etc.) with capillary electrophoresis (capillary zone electrophoresis, micellar electrokinetic chromatography with CE-UV-visible or laser-induced fluorescence detection) as well as with the on-coming hyphenated techniques like capillary electrophoresis-electrospray ionization mass spectrometry. The principal preconcentration methods that allowed real sample analysis with CE are also briefly discussed. The pesticides, the separation methods, the used electrolytes, the detection types, the detection limits and the preconcentration methods were classified and presented in tabulated form as a rapid information tool.
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Affiliation(s)
- F Menzinger
- GSF-National Research Center for Environment and Health, Institute for Ecological Chemistry, Neuherberg, Germany
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21
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NUKATSUKA I, NAKAMURA S, WATANABE K, OHZEKI K. Determination of Phenol in Tap Water and River Water Samples by Solid-Phase Spectrophotometry. ANAL SCI 2000. [DOI: 10.2116/analsci.16.269] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Isoshi NUKATSUKA
- Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
| | - Sachiko NAKAMURA
- Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
| | - Kaori WATANABE
- Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
| | - Kunio OHZEKI
- Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
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22
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Abstract
Capillary electrophoresis has been increasingly used during the past few years for the separation and determination of surfactants. These substances are applied in many household and industrial products such as laundry detergents, cosmetics and pharmaceuticals, often as homologous and isomeric mixtures. Product development and control as well as toxicological and environmental analyses require selective and sensitive analytical methods. This review presents capillary electrophoretic techniques to determine important representatives of cationic, anionic, and neutral surfactants. The application of different buffer additives such as organic solvents, cyclodextrins or micelles to enhance the resolution of complex mixtures is discussed. Besides direct and indirect UV and fluorescence detection, examples for conductivity and mass spectrometric detection are also given. Derivatization procedures to improve the detectability and implement charge in neutral analytes are described. The successful use of capillary electrophoresis for surfactant determinations has proven that it can serve as a routine technique in many real-world applications. Robust, validated methods for the quantitation of single compounds, such as alkylbenzene sulfonates, sodium dodecyl sulfate and benzalkonium salts, are now available. Characteristic peak patterns (fingerprint analysis) can be used for the identification of surfactants in multicomponent formulations (e.g. ethoxylates and phosphonates).
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Affiliation(s)
- K Heinig
- Cornell University, Analytical Toxicology, NY, USA
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23
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Abstract
Capillary electrophoresis (CE) has a unique capability for separation of analytes of environmental concern, particularly those that are more polar and ionic, based on the complementary separation principle of electrophoresis. In the past few years, CE has been selectively used to analyze various classes of compounds having current or potential environmental relevance. This review outlines the current status of CE for the determination of environmental pollutants, based predominantly on research results published from the beginning of 1997 to early 1999. Covered are environmental pollutants of all types except pesticides and inorganics. Certain naturally produced toxins are also covered because of their significant impacts upon human health and the environment. CE methods, as with all methods, must be judged on their ability to provide approaches that are reliable, sensitive, selective, and rapid, while meeting "green chemistry" initiatives for pollution prevention. We also compare CE methods to benchmark environmental techniques involving gas chromatography-mass spectrometry (GC-MS), liquid chromatography-mass spectrometry (LC-MS), and high performance liquid chromatography (HPLC).
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Affiliation(s)
- G W Sovocool
- US Environmental Protection Agency, National Exposure Research Laboratory, Las Vegas, NV 89193-3478, USA.
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24
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Abstract
This paper provides an overview on the current status of capillary electrophoresis (CE) and capillary electrochromatography (CEC). The focus is largely on the current application areas of CE where routine methods are now in place. These application areas include the analysis of DNA, clinical and forensic samples, carbohydrates, inorganic anions and metal ions, pharmaceuticals, enantiomeric species and proteins and peptides. More specific areas such the determination of physical properties, microchip CE and instrumentation developments are also covered. The application, advantages and limitations of CEC are covered. Recent review articles and textbooks are frequently cited to provide readers with a source of information regarding pioneering work and theoretical treatments.
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Affiliation(s)
- K D Altria
- GlaxoWellcome R&D, Ware, Hertfordshire, UK.
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25
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Possanzini M, Di Palo V, Desiderio C, Fanali S, Liberti A. Determination of carbon disulphide in air as xanthogenate by ion chromatography and capillary electrophoresis. Chromatographia 1999. [DOI: 10.1007/bf02466911] [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]
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26
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Strategies for determining environmental pollutants at trace levels in aqueous samples by capillary electrophoresis. Trends Analyt Chem 1999. [DOI: 10.1016/s0165-9936(98)00125-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Martínez D, Borrull F, Calull M. Evaluation of different electrolyte systems and on-line preconcentrations for the analysis of haloacetic acids by capillary zone electrophoresis. J Chromatogr A 1999; 835:187-96. [PMID: 10220921 DOI: 10.1016/s0021-9673(98)01036-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This study compares the sodium chromate, potassium hydrogenphthalate, 2,6-naphthalenedicarboxylic acid dipotassium and sodium tetraborate electrolyte systems, for determining haloacetic acids using capillary zone electrophoresis with and without modified electroosmotic flow. In order to detect low concentrations of these compounds, an on-line preconcentration step was carried out. Results were good when standard solutions were analysed, but when the method was applied to real samples, the sample had to be pretreated to decrease the interference of the matrix. For this reason, a solid-phase extraction process with LiChrolut EN cartridges was applied to clean up the sample before the injection.
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Affiliation(s)
- D Martínez
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Tarragona, Spain
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28
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Abstract
This review deals with the separation mechanisms applied to the separation of inorganic anions by capillary electrophoresis (CE) techniques. It covers various CE techniques that are suitable for the separation and/or determination of inorganic anions in various matrices, including capillary zone electrophoresis, micellar electrokinetic chromatography, electrochromatography and capillary isotachophoresis. Detection and sample preparation techniques used in CE separations are also reviewed. An extensive part of this review deals with applications of CE techniques in various fields (environmental, food and plant materials, biological and biomedical, technical materials and industrial processes). Attention is paid to speciations of anions of arsenic, selenium, chromium, phosphorus, sulfur and halogen elements by CE.
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Affiliation(s)
- D Kaniansky
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic
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29
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Valsecchi SM, Polesello S. Analysis of inorganic species in environmental samples by capillary electrophoresis. J Chromatogr A 1999; 834:363-85. [PMID: 10189695 DOI: 10.1016/s0021-9673(98)00914-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The use of capillary electrophoresis for the determination of inorganic species in environmental samples is reviewed. Topics covered include the separation of inorganic anions, inorganic cations, transition metal cations and organometals in different environmental matrices, such as atmospheric deposition, atmospheric aerosols, gases, natural waters, waste waters, soil, sediment and marine biological samples. Cited literature is gathered according to the type of matrix, so that the focus is on the discussion of matrix effects rather than on the method development for a single class of compounds. For each matrix, surveyed methods are tabulated in order to assist the method selection. Innovative applications of capillary electrophoresis to advanced environmental research are also emphasised.
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Nawaby AV, Kruus P, Dabek-Zlotorzynska E. Determination of Anionic Surfactant Turkey Red Oil by Capillary Electrophoresis with Direct UV Detection. ACTA ACUST UNITED AC 1998. [DOI: 10.1002/(sici)1521-4168(19980701)21:7<401::aid-jhrc401>3.0.co;2-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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