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Datta K, Das SK. Thin Layer Chromatographic Method for Rapid Quantification and Identification of Trimethoprim and Sulfamethoxazole in Pharmaceutical Dosage Forms. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01483918808076781] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kajal Datta
- a Department of Biochemistry , Central Drugs Laboratory , 3, Kyd Street, Calcutta , 700016 , India
| | - Saroj K. Das
- a Department of Biochemistry , Central Drugs Laboratory , 3, Kyd Street, Calcutta , 700016 , India
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2
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Linares Aponte R, Ayala Díaz J, Afonso Perera A, González Díaz V. Simple Thin Layer Chromatography Method with Fibre Optic Remote Sensor for Fluorimetric Quantification of Tryptophan and Related Metabolites. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079608005530] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- R. Linares Aponte
- a Department of Analytical Chemistry , Food Science and Toxicology University of La Laguna , E-38204, La Laguna, Spain
| | - J. Ayala Díaz
- a Department of Analytical Chemistry , Food Science and Toxicology University of La Laguna , E-38204, La Laguna, Spain
| | - A. Afonso Perera
- a Department of Analytical Chemistry , Food Science and Toxicology University of La Laguna , E-38204, La Laguna, Spain
| | - V. González Díaz
- a Department of Analytical Chemistry , Food Science and Toxicology University of La Laguna , E-38204, La Laguna, Spain
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Linares RM, Ayala JH, Afonso AM, González V. NON-LINEAR CALIBRATION IN QUANTITATIVE ANALYSIS BY HPTLC UTILIZING A FIBRE OPTIC FLUORESCENCE DETECTOR. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-100101824] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- R. M. Linares
- a Departamento de Química Analítica , Universidad de La Laguna , Nutrición y Bromatología, La Laguna, E-38201, Spain
| | - J. H. Ayala
- a Departamento de Química Analítica , Universidad de La Laguna , Nutrición y Bromatología, La Laguna, E-38201, Spain
| | - A. M. Afonso
- a Departamento de Química Analítica , Universidad de La Laguna , Nutrición y Bromatología, La Laguna, E-38201, Spain
| | - V. González
- b Departamento de Química Analítica , Universidad de La Laguna , Nutrición y Bromatología, La Laguna, E-38201, Spain
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4
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Brown KK, Cheever KL, Butler MA, Shaw PB, McLaurin JL. Synthesis, characterization, and use of 2-[(2H(9))butoxy]acetic acid and 2-(3-methylbutoxy)acetic acid as an internal standard and an instrument performance surrogate, respectively, for the gas chromatographic-mass spectrometric determination of 2-butoxyacetic acid, a human metabolite of 2-butoxyethanol. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 792:153-66. [PMID: 12860023 DOI: 10.1016/s1570-0232(03)00256-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
2-[(2H(9))Butoxy]acetic acid and 2-(3-methylbutoxy)acetic acid were synthesized, mixed with 2-butoxyacetic acid, and separated by capillary gas chromatography on a fused-silica column with a length of 50 m, inside diameter of 0.200 mm, and a "free fatty acid phase" wall coating of 0.3 microm film. 2-[(2H(9))Butoxy]acetic acid, 2-butoxyacetic acid, and 2-(3-methylbutoxy)acetic acid were baseline resolved at retention times of 13.55, 13.78, and 15.20 min; 2-(3-methylbutoxy)acetic acid having a peak efficiency of 360,000. Mass spectrometric detection using selected ion monitoring at m/z 66, 57, and 71 showed linear analytical responses from 0.04 ng to at least 200 ng with a limit of detection of 0.04 ng for 2-butoxyacetic acid.
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Affiliation(s)
- Kenneth K Brown
- National Institute for Occupational Safety and Health, 4676 Columbia Parkway, R-7 Cincinnati, OH 45226, USA.
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5
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Kok S, Bakker I, Gooijer C, Brinkman U, Velthorst N. Fluorescence line-narrowing spectroscopy of analytes deposited on thin-layer chromatography plates. Anal Chim Acta 1999. [DOI: 10.1016/s0003-2670(99)00155-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Vovk I, Prosˇek M. Reproducibility of densitometric and image analysing quantitative evaluation of thin-layer chromatograms. J Chromatogr A 1997. [DOI: 10.1016/s0021-9673(97)00442-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Zahradníčková H, Šimek P, Hořihcová P, Tříska J. Determination of atrazine and simazine in drinking and surface waters by solid-phase extraction and high performance thin layer chromatography. J Chromatogr A 1994. [DOI: 10.1016/0021-9673(94)00982-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Olsson U, Kaufmann P, Herslöf BG. Densitometry of Lipids with Iodine Staining on HPTLC. ACTA ACUST UNITED AC 1990. [DOI: 10.1080/01483919008049010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Baeyens WRG, Ling BL, Stragier K. HPTLC fluorescence enhancement of glutathione-SBD: Effect of cyclodextrins, triton and alkanes. Chromatographia 1990. [DOI: 10.1007/bf02317911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Fell RD. The qualitative and quantitative analysis of insect hemolymph sugars by high performance thin-layer chromatography. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0300-9629(90)90735-b] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Ling BL, Baeyens WR, Raemdonck A. Application of high-performance thin-layer chromatography—fluorescence densitometry to the simultaneous determination of reduced and oxidized glutathione. J Chromatogr A 1990. [DOI: 10.1016/s0021-9673(01)89585-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Poole CF, Poole SK. Progress in densitometry for quantitation in planar chromatography. JOURNAL OF CHROMATOGRAPHY 1989; 492:539-84. [PMID: 2671002 DOI: 10.1016/s0378-4347(00)84479-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The principal methods for obtaining quantitative information from separations performed by planar chromatographic techniques are reviewed. Recent advances in obtaining structural information for sample identification of separated components are also discussed. Reasonable expectations concerning future developments in densitometry are made.
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Affiliation(s)
- C F Poole
- Department of Chemistry, Wayne State University, Detroit, MI 48202
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13
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Abstract
Luminescence emission from drugs is strongly dependent on their physicochemical environment. Several biomedically and environmentally important compounds and pharmaceuticals exhibit sufficient intrinsic luminescence properties to allow their determination by high-performance liquid chromatography (HPLC) with fluorimetric, chemiluminescence or room temperature phosphorimetric detection. In the case of weakly fluorescing compounds it is possible to use the dependence of the emitted radiation on the molecular environment at the moment of measurement. The composition of the eluent, i.e. solvents, added salts and buffers, pH and ionic strength, oxygen content and temperature, are of the highest importance for the luminescence detection of drugs in solution (e.g. in liquid chromatography) or adsorbed onto solid surfaces (e.g. in thin-layer chromatography). Post-column or post-plate acid-base manipulation and the use of specific reagents may remarkably enhance the observed luminescence of several molecules. The term "enhancement" of luminescence comprises various sample treatments leading to an increase of the emitted radiation. These treatments include the addition of non-fluorescent compounds to, or the creation of organized media (surfactants, cyclodextrins, heavy atoms) in, the sample to be measured. They may also involve changes in molecular environment, pH, the application of excessive drying conditions, the removal of oxygen, the protection of adsorbed compounds against non-radiative decay mechanisms by means of specific spraying or dipping conditions, amongst others. The use of organized media in luminescence spectroscopy is growing. Many of the recent studies have involved micelles for enhancing the fluorescence, room temperature phosphorescence and chemiluminescence of several chemicals. Cyclodextrins are increasingly used for various analytical applications. Liquid paraffin, triethanolamine, dodecane, Triton X-100 and Fomblin Y-Vac are commonly used fluorescence enhancers in chromatographic assays. Examples of these systems in drug analysis are presented.
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Affiliation(s)
- W R Baeyens
- Laboratory of Pharmaceutical Chemistry and Drug Analysis, Faculty of Pharmaceutical Sciences, State University of Ghent, Belgium
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Ling BL, Baeyens WR, Del Castillo B, Stragier K, Marysael H, De Moerloose P. Use of enhancers in the HPTLC fluorescence analysis of thiols. J Pharm Biomed Anal 1989; 7:1671-8. [PMID: 2490556 DOI: 10.1016/0731-7085(89)80181-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Several thiols of biological and pharmacological interest, including glutathione, coenzyme A, acetylcysteine and captopril were derivatized with the fluorogenic reagents SBD-F and ABD-F and analysed by high-performance thin-layer chromatography (HPTLC)-fluorodensitometry on silica gel 60 plates, using isopropyl ether-methanol-water-acetic acid (9:8:2:1, v/v/v/v) as the developing solvent. The luminescence was considerably increased when several types of enhancers were applied as dipping reagents: Triton X-100, liquid paraffin and cyclodextrins; thus the detectability of the thiol fluorophores was improved. The influence of enhancer concentration, method of application, sample concentration, drying conditions and measuring time after plate dipping were investigated. The greatest enhancement was achieved using a 40% (v/v) solution of Triton X-100 in toluene as a dipping reagent for the determination of SBD-acetylcysteine; more than a 10-fold increase of the fluorescence signal was obtained, allowing low picogram detection limits.
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Affiliation(s)
- B L Ling
- Laboratory of Pharmaceutical Chemistry and Drug Analysis, Faculty of Pharmaceutical Sciences, State University of Ghent, Belgium
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Ling BL, Baeyens WR, Del Castillo B, Imai K, De Moerloose P, Stragier K. Determination of thiols of biological and pharmacological interest by high-performance thin-layer chromatography and fluorescence scanning densitometry. J Pharm Biomed Anal 1989; 7:1663-70. [PMID: 2490555 DOI: 10.1016/0731-7085(89)80180-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The application of high-performance thin-layer chromatography (HPTLC) with fluorescence scanning densitometry provides a simple, rapid and reliable system for the qualitative and quantitative determination of several thiols of biological and pharmacological interest. The determination of a mixture of thiols (captopril, coenzyme A, cysteamine, cysteine and glutathione), together with their disulphides may readily be performed by pre-chromatographic derivatization with the thiol-specific fluorobenzoxadiazole reagents SBD-F and ABD-F, followed by HPTLC separation on silica gel plates using isopropyl ether-methanol-water-acetic acid (9:8:2:1, v/v/v/v) as the developing solvent, and fluorodensitometric measurement of the fluorescing derivatives. Detection limits of about 30 pg (coenzyme A) to 6 pg (cysteamine) per spot were achieved; the relative standard deviation (RSD) of the complete procedure was 1.16-3.2%.
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Affiliation(s)
- B L Ling
- Laboratory of Pharmaceutical Chemistry and Drug Analysis, Faculty of Pharmaceutical Sciences, State University of Ghent, Belgium
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Poole SK, Dean TA, Poole CF. Preparation of environmental samples for the determination of polycyclic aromatic hydrocarbons by thin-layer chromatography. J Chromatogr A 1987; 400:323-41. [PMID: 2444609 DOI: 10.1016/s0021-9673(01)81628-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An evaluation of extraction procedures, liquid-liquid distribution systems, Sep-Pak cartridges, liquid-solid chromatography using silica, alumina and chemically modified silica packings (acid-base treated ethylammonium nitrate and picric acid impregnated), macroreticular resins and gel permeation columns for the analysis of polycyclic aromatic hydrocarbons (CPAHs) in environmental samples by thin-layer chromatography is discussed. For particulate samples solvent extraction using a Soxhlet apparatus or ultrasonication was found to be preferable to sublimation and liquid-liquid distribution between hexane and dimethyl sulfoxide followed by silica gel column chromatography was the preferred method for sample clean-up. Using this procedure enabled six PAHs (anthracene, fluoranthene, benz[a]anthracene, perylene, pyrene, and coronene) to be determined quantitatively in urban air particulate, diesel engine exhaust particulate, laboratory ventilator dust, household dust, river water, and tea samples. The PAHs were identified by coincidence of retention between the sample and standards in the same chromatographic system and by adequate agreement with standards for their normalized emission response ratios. The two-point calibration method was used for quantitation. Good agreement for the concentration of PAHs in the air particulate and diesel particulate extracts with published data using gas chromatography-mass spectrometry and high-performance liquid chromatography was found.
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Affiliation(s)
- S K Poole
- Department of Chemistry, Wayne State University, Detroit, MI 48202
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Tomboulian P, Walters SM, Brown KK. Quantitation of trace levels of phenyltin compounds using HPTLC. Mikrochim Acta 1987. [DOI: 10.1007/bf01201712] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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