Critical applications of SW 846 US EPA methods to evaluation of marine samples quality

Authors

  • Patrícia Ferreira Silvério Consultoria Paulista de Estudos Ambientais Ltda EPP
  • Cristina Gonçalves Consultoria Paulista de Estudos Ambientais Ltda EPP
  • Satie Taniguchi Universidade de São Paulo; Consultoria Paulista de Estudos Ambientais Ltda EPP
  • Sylvia Niemeyer Pinheiro Lima Consultoria Paulista de Estudos Ambientais Ltda EPP

DOI:

https://doi.org/10.1590/S1679-87592010000700007

Keywords:

sediment, SW 846 methods, Quantitation limit, Salt and brackish water, interferences

Abstract

Technical evaluation of analytical data is of extreme relevance considering it can be used for comparisons with environmental quality standards and decision-making as related to the management of disposal of dredged sediments and the evaluation of salt and brackish water quality in accordance with CONAMA 357/05 Resolution. It is, therefore, essential that the project manager discusses the environmental agency's technical requirements with the laboratory contracted for the follow-up of the analysis underway and even with a view to possible re-analysis when anomalous data are identified. The main technical requirements are: (1) method quantitation limits (QLs) should fall below environmental standards; (2) analyses should be carried out in laboratories whose analytical scope is accredited by the National Institute of Metrology (INMETRO) or qualified or accepted by a licensing agency; (3) chain of custody should be provided in order to ensure sample traceability; (4) control charts should be provided to prove method performance; (5) certified reference material analysis or, if that is not available, matrix spike analysis, should be undertaken and (6) chromatograms should be included in the analytical report. Within this context and with a view to helping environmental managers in analytical report evaluation, this work has as objectives the discussion of the limitations of the application of SW 846 US EPA methods to marine samples, the consequences of having data based on method detection limits (MDL) and not sample quantitation limits (SQL), and present possible modifications of the principal method applied by laboratories in order to comply with environmental quality standards.

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Published

2010-06-01

How to Cite

Silvério, P. F., Gonçalves, C., Taniguchi, S., & Lima, S. N. P. (2010). Critical applications of SW 846 US EPA methods to evaluation of marine samples quality . Brazilian Journal of Oceanography, 58(spe3), 49-56. https://doi.org/10.1590/S1679-87592010000700007

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Section

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