Analytical methodology for analyses of PCBs in liver of fish of the river Paraíba do Sul, SP / Metodologia analítica para análise de PCBs em fígado de peixe do Rio Paraíba do Sul

AUTOR(ES)

José Carlos Pires Penteado

DATA DE PUBLICAÇÃO

2000

RESUMO

The chlorinated biphenyls are organochlorinated compound with around 209 congeners some them are very toxic. They were produced during 30 years and used mainly in the eletronic equipment (transformers and capacitors). Brazilian legislation dont obligate the substitution of equipaments containing PCBs that are still being used. So this could be a signifincat source of environrnent contamination. The industries have settled the Paraíba Valley since 50s that can represent the major source of PCBs. The South Paraíba river main hidric source that has been used caption for water suplly and subsistent fishing. It receives also industrial efluents and domestic sewer. In spite of bioconcentration characteristics of organochIorinated in fishesliver, this organ was decided to be used as bioindicator. PCBs level can be avaliated indiretly, analysing the exposure of some species of fishes, and arevall contamination around the fish population. From this proposed analytical method total PCBs from traira here found nearly 32 to 143 ng/g in liver and 8 to 26 ng/g in mandis liver. The aproached recuperation were about 50 to 100%, the limit detection for these 13 congeners were around 1 to 3ng/g. The most genotoxic congeners were found in traira (PCB 77 20 ± 9ng/g and PCB 12621 ± 3ng/g) and other hand, it was only in mandi PCB 77 8 ± 2ng/g. These evalutions are preliminar and necessites further studies to determine the extension of contarnination and the possibly source these compounds contamination.

ASSUNTO(S)

pcbs ascarel polichlorinated biphenyls aroclor fígado pcbs bifenilas policloradas askarel

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