Gas chromatographic separation of methoxylated polychlorinated biphenyl atropisomers
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چکیده
منابع مشابه
High resolution gas chromatographic analysis of cytochrome P-448 inducing polychlorinated biphenyl congeners in hazardous waste.
Polychlorinated biphenyls (PCBs), which have been commercially manufactured since 1929, are complex mixtures of many congeners and several homologues. They have been used in a variety of industrial and non-industrial applications which has allowed large quantities to be released into the workplace and environment1-6. Based on a 198 1 estimate, as many as 17 million pounds of PCBs were entering ...
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Synthetic dipeptides comprising mixtures of enantiomers, diastereomers, or sequential isomers were converted into their N-perfluoroacetyl dipeptide esters (perfluoroacetyl: trifluoroacetyl, pentafluoroacetyl, heptafluorobutyryl; ester: methyl, 1-propyl, 2-propyl, 2,2,2-trifluoroethyl) and analyzed by GC-MS on the chiral stationary phases Chirasil-L-Val and Lipodex-E using helium as carrier gas....
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detected in these blank determinations that we were not certain whether it came from the Soluene or other sources. You may note that the blood of control rats which was analyzed with the use of Soluene did not contain detectable amounts of asbestos and zero fibers per gram was reported. We have since repeated this work (as yet unpublished) in an experiment in which asbestos was fed to rats and ...
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The enantiomeric composition of polychlorinated biphenyl (PCB) atropisomers, including PCB 95, PCB 149 and PCB 132, was measured in 11 livers of harbour porpoises (Phocoena phocoena) from the southern North Sea. Non-racemic enantiomeric ratios (ERs) were found in some samples. The value of ERs in three of the four juvenile porpoises was equal or almost equal to one, while the ERs in all adults ...
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Principle Chromatographic procedures allow a separation of substance mixtures with the aid of a stationary separating phase and a mobile phase. In gas chromatography the mobile phase is a gas. The mobile phase, to which the mixture to be separated is added, transports the substance mixture through the separation column at a constant flow rate. Interactions occur between the mobile phase and the...
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ژورنال
عنوان ژورنال: Journal of Chromatography A
سال: 2008
ISSN: 0021-9673
DOI: 10.1016/j.chroma.2008.08.044