Thin-Layer Chromatography for Chlorinated Pesticide Residue Analysis without Cleanup

1964 ◽  
Vol 47 (2) ◽  
pp. 306-310
Author(s):  
H V Morley ◽  
M Chiba
Keyword(s):  
Gas Chromatography ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Plant Extracts ◽  
Residue Analysis ◽  
Rapid Screening ◽  
Pesticide Residue Analysis ◽  
Cleanup Procedure ◽  
Layer Chromatography

Abstract Thin-layer chromatography on silica gel may be used for the determination of chlorinated pesticide residues in some plant extracts without prior cleanup, thus eliminating the possible loss of pesticides during the cleanup procedure. Rapid screening of a large number of samples is thus possible with consequent saving of time and labor. When necessary, thin-layer chromatography may be used as a prior cleanup for gas chromatography.

Thin-Layer Chromatography for Chlorinated Pesticide Residue Analysis

1963 ◽  
Vol 46 (5) ◽  
pp. 884-893 ◽  
Author(s):  
Martin F Kovacs
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Pesticide Residue ◽  
Pesticide Residues ◽  
Residue Analysis ◽  
Rapid Screening ◽  
Gas Liquid Chromatography ◽  
Pesticide Residue Analysis ◽  
Layer Chromatography

Abstract A rapid sensitive method for the application of thin-layer chromatography to the detection and estimation of chlorinated organic pesticide residues has been developed. Compared to paper chromatography the method is faster, more sensitive, and in most cases more specific. Chlorinated pesticide residues were identified in extracts of various food products at concentrations as low as 1 part per billion; these results were verified by gas-liquid chromatography. Because of its simplicity, speed, and sensitivity, thin-layer chromatography is suitable as a rapid screening method or as a confirmatory method in conjunction with gas-liquid chromatography or other analytical methods for chlorinated pesticide residue analysis.

Quantitative Determination of Vitamin E Isomers using Gas Chromatography, High Performance Liquid Chromatography and High Performance Thin Layer Chromatography

2017 ◽  
Vol 54 (3) ◽  
pp. 294
Author(s):  
Hari Ramakrishnan K. ◽  
Janaky Ranjithkumar
Keyword(s):  
Gas Chromatography ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Vitamin E ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Highly Sensitive ◽  
Layer Chromatography

Vitamin E, the fat soluble vitamin is present naturally in some foods and added in food supplements, nutraceuticals etc due to its vital biological function as an antioxidant. Various methods are available for the analysis of vitamin E. Especially High Performance Liquid Chromatography (HPLC) and Gas Chromatography (GC) are exclusively used for the quantitative evaluation of vitamin E, which has also identified the four different isomeric forms of this vitamin. The rate of losses of this vitamin during food processing and analysis, in addition to their transient dynamics, presents complexities in developing a highly sensitive procedure for their separations. Though effective, HPLC instrument is expensive and comparatively cumbersome. In this prospective, the study was to evaluate the usefulness of High Performance Thin Layer Chromatography (HPTLC) in the analysis of vitamin E. There are methods available using Thin Layer Chromatography for its analysis, but they are not sensitive enough to identify the isomeric forms of vitamin E. In this HPTLC method, the different isomeric forms of vitamin E - α, β, γ and δ were identified. This technique shall be considered as an alternative to the other methods such as HPLC and GC.

scholarly journals Recent Advances in the Thin-Layer Chromatography of Pesticides: A Review

2003 ◽  
Vol 86 (3) ◽  
pp. 602-611 ◽  
Author(s):  
Joseph Sherma
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Environmental Samples ◽  
High Performance ◽  
Residue Analysis ◽  
Thin Layer Chroma ◽  
Biological And Environmental Samples ◽  
Layer Chromatography ◽  
Related Compounds

Abstract Advances in the applications of thin-layer chroma-tography (TLC) and high-performance TLC for the separation, detection, identification, and determination of pesticides, other agrochemicals, and related compounds are reviewed for the period 2000–2002. Analyses are described for a variety of samples, such as food, biological, and environmental samples, and for residues of pesticides of various types, including insecticides, herbicides, and fungicides, belonging to different chemical classes. References are included for residue analysis, hydrophobicity studies, and the use of TLC and thin-layer radiochromatography for studies of pesticide metabolism, degradation, uptake, and related topics.

Determination of Oxidative Metabolites of Dimethoate and Thimet in Soil by Emission Spectroscopic Gas Chromatography

1966 ◽  
Vol 49 (3) ◽  
pp. 647-650
Author(s):  
C A Bache ◽  
D J Lisk
Keyword(s):  
Gas Chromatography ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Preparative Thin Layer Chromatography ◽  
Oxidation Products ◽  
Oxygen Analog ◽  
Oxidative Metabolites ◽  
Layer Chromatography

Abstract The conversion of dimethoate to its oxygen analog and the production of oxidative metabolites of Thimet in soil has been shown by using emission spectroscopic gas chromatography for their determination. Preparative thin layer chromatography was vised for prior separation of Thimet oxidation products. The sulfoxide and sulfone of Thimet were the major determinable products.

Thin Layer Chromatography for Pesticide Residue Analysis

1965 ◽  
Vol 48 (5) ◽  
pp. 1018-1022
Author(s):  
Martin F Kovacs
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Pesticide Residue ◽  
Residue Analysis ◽  
Solvent System ◽  
Gas Liquid Chromatography ◽  
Pesticide Residue Analysis ◽  
Slide Technique ◽  
Layer Chromatography ◽  
Semiquantitative Method

Abstract Thin layer chromatography is a simple, rapid, sensitive, and versatile semiquantitative method which is readily applied to pesticide residue analysis. Its greatest value in residue analysis is as a confirmatory method used in conjunction with gas-liquid chromatography. A new solvent system and micro slide technique for the rapid detection of nanogram quantities of many chlorinated pesticide residues are described.

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