Matrix-enhanced degradation of p,p'-DDT during gas chromatographic analysis: a consideration

Article Abstract:

The use of isotopically labeled p,p'-DDT during gas chromatographic (GC)/mass spectrometric analysis of large volume water samples enhanced degradation of the pesticide. Monitoring the GC-derived breakdown of the pesticide is required, and a performance evaluation standard with p,p'-DDT but not p,p'-DDD or p.p'-DDE can be injected at regular intervals throughout an analytical sequence to monitor GC degradation. Matrix-enhanced GC degradation levels greatly surpassed the <20% breakdown levels indicated by bracketing injections of the performance evaluation standard containing labeled and unlabeled DDT.

DDT, DDT (Insecticide), Decomposition (Chemistry)

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Multidimensional gas chromatographic analysis of toxaphene

Article Abstract:

Analysis of a technical toxaphene mixture and several biological samples using multidimensional gas chromatography shows that the major peaks present in the chromatograms consist of two to 10 congeners. Toxaphene, which is found in the aquatic environment with a widespread, worldwide distribution was deemed difficult to analyze due to its complex character. Findings show the inappropriateness, in most cases, of single-column chromatography for a congener-specific determination of toxaphene congeners.

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Persistency of toxaphene components in mammals that can be explained by molecular modeling

Article Abstract:

The persistence accumulation of toxiphene hepta-, octa-, and nonachlorobornanes in marine mammals is examined in this study.

Germany, Switzerland, Science & research, Research & Development, Scientific Research and Development Services, Pollutants produced & recycled, Hunting, trapping, game propagation, Hunting and Trapping, Marine Mammals, Research institutes, Contamination

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