Combination of infrared spectroscopy and thin-layer chromatography for the identification of slightly soluble substances

1980 ◽  
Vol 202 (1) ◽  
pp. 151-153 ◽  
Author(s):  
Karl Otto Alt ◽  
Gustav Székely
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Layer Chromatography

DDT-Type Compounds: Separation and Identification by a System Combining Thin Layer Chromatography, Gas Chromatography, and Infrared Spectroscopy

1968 ◽  
Vol 51 (6) ◽  
pp. 1247-1260
Author(s):  
M B Abou-Donia ◽  
D B Menzel
Keyword(s):  
Gas Chromatography ◽  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Electron Capture ◽  
Structural Changes ◽  
Effective Technique ◽  
Rf Values ◽  
Solvent Systems ◽  
Layer Chromatography

Abstract Infrared spectroscopy, in combination with TLC and GLC, offers an effective technique for isolation, separation, and identification of DDT-type compounds. Rf values for DDT and 13 other compounds, most of which have been reported as DDT breakdown products, have been determined in 27 solvent systems, using TLC techniques. Three columns, in combination with the electron capture detector, have been experimentally studied to analyze the 13 DDT-like compounds. The positions and intensities of the infrared bands of the 14 compounds have been measured in KBr. The variations of these measurements have been discussed in relation to the structural changes of DDT-type compounds.

Micro-Infrared Analysis of Dieldrin, Endrin, and Other Chlorinated Pesticide Residues in Complex Substrates

1966 ◽  
Vol 49 (5) ◽  
pp. 989-996
Author(s):  
W R Payne ◽  
William S Cox
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Pesticide Residues ◽  
Industrial Wastes ◽  
Infrared Analysis ◽  
Chlorinated Pesticides ◽  
Effective Technique ◽  
Extraction Procedures ◽  
Layer Chromatography

Abstract The combination of column and thin layer chromatography provides an effective technique for the isolation of “trace” amounts of chlorinated hydrocarbon insecticides in complex substrates. These insecticides can then be identified by micro-infrared spectroscopy. The extraction procedures, column techniques, and KBr pellet preparation for analyses of chlorinated pesticides in industrial wastes are described.

Sterols produced by Cryptotnonas ovata var. palustris

1968 ◽  
Vol 14 (8) ◽  
pp. 837-839 ◽  
Author(s):  
R. P. Collins ◽  
K. Kalnins
Keyword(s):  
Infrared Spectroscopy ◽  
Melting Point ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Mass Spectroscopy ◽  
Layer Chromatography

Cholesterol and stigmasterol were isolated from C. ovata var. palustris. The compounds were identified by thin-layer chromatography, mass spectroscopy, infrared spectroscopy, derivative formation, and melting point determinations.

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