Enantioselective determination of chlordane components, metabolites, and photoconversion products in environmental samples using chiral high-resolution gas chromatography and mass spectrometry

Article Abstract:

A number of proceses, including chiral high-resolution gas chromatography and electron ionization (EI), can be used to analyse enantiomer separation of several chlordane compounds and photoconversion products. The presence of photoheptachlor and photo-cis-chlordanes in various species of sea animals shows that photoreactions of chlordane compounds are important in the transformation of these compounds in the environment, with photoheptachlor and two isomeric photo-cis-chlordanes being found in biota from the Artic, the Baltic and Antarctic areas. HEP has been shown to be both an enzymatic and photochemical product of heptachlor, but it is not certain what roles are played by the biological and the photochemical conversion to the residues of HEP in the sea animals studied.

CHEMICALS AND ALLIED PRODUCTS, Chlordane

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Stereo- and enantioselective determination using chiral high-resolution gas chromatography and chiral high-performance liquid chromatography

Article Abstract:

Different types of acetamide pesticide stereoisomers were characterized using chiral high-resolution gas chromatography (HRGC) and chiral high-performance liquid chromatography. The results showed that there were variations in the resolution of diastereomers and achiral HRGC exhibited no resolution of diastereomers. The resolution of C-chiral enantiomers was easier as compared to the resolution of axial-chiral enantiomers.

Usage, Pesticides, Liquid chromatography, Gas chromatography

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Isomer and enantioselective degradation of hexachlorocyclohexane isomers in sewage sludge under anaerobic conditions

Article Abstract:

The behavior of four different hexachlorocyclohexane (HCH) isomers in sewage sludge during enantioselective degradation was investigated using chiral high-resolution gas chromatography mass spectrometry. The results showed that degradation was much slower in sterilized sludge although it was faster in pond water where degradation was primaily due to hydrolysis. In active sludge, HCH degradation was 80-95% biotic.

Pesticide and Other Agricultural Chemical Manufacturing, Agricultural chemicals, not elsewhere classified, Lindane, Biodegradation, Sewage sludge

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