Validation of Immunoassay Methods to Determine Hydrocarbon Contamination in Estuarine Sediments

نویسندگان

  • Gilberto Fillmann
  • Márcia C. Bicego
  • Ademilson Zamboni
  • Tim W. Fileman
  • Michael H. Depledge
  • James W. Readman
چکیده

O desempenho de dois kits comerciais de ensaios imunológicos (ELISA com anticorpos ligados a partículas magnéticas) foi avaliado para a quantificação de hidrocarbonetos em sedimentos estuarinos. O kit BTEX RaPID Assay foi utilizado para analisar hidrocarbonetos alifáticos e aromáticos leves, enquanto que o kit c-PAH RaPID Assay foi utilizado para hidrocarbonetos poliaromáticos carcinogênicos (≥ 4 anéis aromáticos). Os resultados foram validados comparando com análises feitas por cromatografia gasosa com detectores de ionização de chama (GC/DIC) e de espectrometria de massa (GC/EM). Foi observada uma boa correlação entre as técnicas (r=0,68-0,97), estando a disparidade relacionada a diferenças na composição relativa de hidrocarbonetos que afeta a resposta dos anticorpos dos testes ELISA. De uma forma geral, os resultados obtidos com os kits ELISA foram comparáveis aos obtidos por cromatografia, confirmando a validade dessa técnica em protocolos de avaliação preliminar, visando o emprego de técnicas analíticas de alta resolução em amostras específicas.

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تاریخ انتشار 2007