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Artigos • Bol. Inst. Oceanogr. 32 (2) • 1983 • https://doi.org/10.1590/S0373-55241983000200001   copiar

Determinação de ΣDDT e PCBs na água do mar através de pré-concentração em resinas poliméricas

Determination of ΣDDT and PCBs in the seawater by pre-concentration method in polymerical resins

Autoria SCIMAGO INSTITUTIONS RANKINGS

Resumo

A pre-concenvration method for extracting organochlorines from seawater was employed to analyse ΣDDTs and PCBs. The sampling device and the conditions for optimal adsortion performance are described. Recovery tests with spiked solutions were made before applying the method on real samples. Working up of the samples prior to gas chromatographic analysis, precautions and advantages of the procedure are also discussed. The application of the method for seawater, containing very low levels of organochlorines, is shown by data from equatorial surface waters. The average level for ΣDDT and PCBs was 0.21 ng/l and 0.37 ng/l. The overall precision of the method is about ± 15% with a lower limit of detection of 0.1 ng/l-1 for PCBs and 0.05 ng/l-1 for ZDDT.

DDT; PCBs; Analysis in Equatorial Atlantic seawater; Pre-concentrat on techniques in resins

DDT; PCBs; Analysis in Equatorial Atlantic seawater; Pre-concentrat on techniques in resins

DDT; PCBs; Análise na água do mar do Atlântico Equatorial; Técnicas de pré-concentração em resinas

ARTIGOS

Determinação de Σ DDT e PCBs na água do mar através de pré-concentração em resinas poliméricas

Determination of Σ DDT and PCBs in the seawater by pre-concentration method in polymerical resins

Rolf Roland Weber

Instituto Oceanográfico da Universidade de São Paulo

Descritores: DDT, PCBs, Análise na água do mar do Atlântico Equatorial , Técnicas de pré-concentração em resinas.

SYNOPSIS

A pre-concentration method for extracting organochlorines from seawater was employed to analyse ΣDDTs and PCBs. The sampling device and the conditions for optimal adsortion performance are described. Recovery tests with spiked solutions were made before applying the method on real samples. Working up of the samples prior to gas chromatographic analysis, precautions and advantages of the procedure are also discussed. The application of the method for seawater, containing very low levels of organochlorines, is shown by data from equatorial surface waters. The average level for ΣDDT and PCBs was 0.21 ng/l and 0.37 ng/l. The overall precision of the method is about ± 15% with a lower limit of detection of 0.1 ng/l-1 for PCBs and 0.05 ng/l-1 for ΣDDT.

Descriptors: DDT, PCBs, Analysis in Equatorial Atlantic seawater, Pre-concentrat on techniques in resins.

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

Agradecimentos

Este trabalho foi possível, graças ao Convénio FINEP/IOUSP, Subprojeto Química, que possibilitou a aquisição de material e equipamento para o Laboratório de Oceanografia Química do IOUSP. Agradecemos, ainda, aos Técnicos de Laboratório Lourival Pereira de Souza e Gilberto Ivo Sarti, pela colaboração nas análises de laboratório e na confecção de gráficos e desenhos, respectivamente. E à tripulação e oficiais do N/Oc. "Prof. W. Besnard", nossos agradecimentos pela colaboração durante a fase de coleta das amostras.

(Recebido 16-mar-1983; aceito 06-set-1983)

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Datas de Publicação

  • Publicação nesta coleção
    31 Maio 2012
  • Data do Fascículo
    1983

Histórico

  • Aceito
    06 Set 1983
  • Recebido
    16 Mar 1983
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