RESUMO
High-speed liquid chromatography in the system silica gel/dry n-hexane and ultraviolet spectrometry have been used to study the composition of various types of commercially available mixtures of chlorinated biphenyls. Special attention has been paid to the analysis of highly chlorinated products. In addition to data previously published, retention times are recorded for 11 individual polychlorinated biphenyls. The results of high-speed liquid chromatography are compared with those obtained in several normal and reversed-phase thin-layer chromatographic systems.
Assuntos
Cromatografia Líquida de Alta Pressão , Cromatografia em Camada Fina , Bifenilos Policlorados/análise , Géis , Inseticidas/análise , Métodos , Dióxido de Silício , Solventes , Espectrofotometria UltravioletaAssuntos
Hidrocarbonetos Clorados , Naftalenos , Acne Vulgar/induzido quimicamente , Fenômenos Químicos , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Química , Edema/induzido quimicamente , Poluentes Ambientais/análise , Hidrocarbonetos Clorados/análise , Hidrocarbonetos Clorados/toxicidade , Naftalenos/análise , Naftalenos/toxicidade , Bifenilos Policlorados/análise , Análise Espectral/métodos , Ceras/síntese químicaRESUMO
High-speed liquid chromatography in the system silica gel-dry n-hexane has been used to characterize the behaviour of a series of commercially available mixtures of chlorinated biphenyls, viz., Aroclor 1221-1268. An attempt has been made to assign a large number of peaks in the chromatograms of the Aroclors to the individual constituents. To this end, retention times and UV spectra were recorded for 47 polychlorinated biphenyls. The dependence of retention and spectral characteristics on the chlorine content of the substituted biphenyls is discussed
