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Levels of polychlorinated biphenyls em leite em po integral e ingestao diaria estimada para uma populacao infantil

Polychlorinated biphenyls (PCBs) are chemical contaminants classified as persistent organic pollutants. Although, their use has been banned for several decades, PCBs are still scattered in the environment and; therefore, all living organisms may be exposed to these compounds. Diet, especially fatty...

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Bibliographic Details
Published in:Ciência rural 2018-12, Vol.48 (12)
Main Authors: Costabeber, Ijoni Hilda, Coelho, Andreia Niederauer, Schwanz, Thiago Guilherme, Weis, Grazielle Castagna Cezimbra, Carpilovsky, Cristiane Kohler
Format: Article
Language:English
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Summary:Polychlorinated biphenyls (PCBs) are chemical contaminants classified as persistent organic pollutants. Although, their use has been banned for several decades, PCBs are still scattered in the environment and; therefore, all living organisms may be exposed to these compounds. Diet, especially fatty foods such as milk, has been recognized as one of the main sources of human exposure to PCBs. Hence, the aim of this study was to evaluate the residual levels of indicator PCBs in whole milk powder consumed by preschool children in the Municipality of Imbe, State of Rio Grande do Sul, Brazil and to determine the estimated daily intake of these PCBs through this food. Analyses were performed by GC-pECD and the results were confirmed by GC/MS. The PCBs 28, 52 and 153 displayed values below the limit of quantification. The PCBs 138 and 180 showed mean values of0.073 and 0.157ng.[g.sup.-1] lipid, respectively. These values were below the reference limits established by the European Community. The estimated total daily intake of PCBs was 0.110ng.[g.sup.-1] lipid of body weight per day, a value lower than that established by the legislations of Belgium and Norway. Key words: indicator PCBs, milk powder, daily intake, children. Os bifenilos policlorados (PCBs) sao contaminantes quimicos classificados como poluentes organicos persistentes. Embora seu uso tenha sido banido ha mais de decadas, os PCBs ainda encontram-se presentes no meio ambiente e portanto, todos os organismos vivos podem estar expostos a esses compostos. A alimentacao, especialmente alimentos gordurosos, como leite, tem sido reconhecida como uma das principais fontes de exposicao humana aos PCBs. Assim, o objetivo deste estudo foi avaliar os niveis residuais de PCBs indicadores em leite em po integral consumido por pre-escolares no Municipio de Imbe, Rio Grande do Sul, e determinar a ingestao estimada desses PCBs por meio deste alimento. As analises foram realizadas em GC-[micro]ECD e os resultados foram confirmados em GC/MS. Os PCBs 28, 52 e 153 apresentaram valores abaixo do limite de quantificacao. Os PCBs 138 e 180 apresentaram valores medios de 0,073 e 0,157ng.[g.sup.-1] lipidio, respectivamente. Estes valores estavam abaixo dos limites de referencia estabelecidos pela Comunidade Europeia. A ingestao diaria total estimada de PCBs foi de 0,110ng.[g.sup.-1] de peso corporal por dia, valor inferior ao estabelecido pelas legislacoes da Belgica e da Noruega. Palavras-chave: PCBs indicadores, leite em po
ISSN:0103-8478
DOI:10.1590/0103-8478cr20180505