Global uncertainty associated with the analysis of PCBs and chlordanes in drinking water by headspace-SPME-GC/MS/MS

• Tipo: Artigo em Revista Científica Internacional
• Data: 2005

Autores

Herbert, P (Autor) Outra; Alves, A (Autor) FEUP; Santos, L (Autor) FEUP

Revista

Título: International Journal of Environmental Analytical Chemistry

Vol. 85 Nº 4

Páginas: 267-280

ISSN: 0306-7319

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 9 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-000-3VX

DOI: 10.1080/0306731042000303189

Abstract (EN): Until recently, analytical results were normally stated its declared values, sporadically associated with strict uncertainty evaluation. Current trends in analytical chemistry require traceable data together with fully evaluated uncertainty. Polychlorinated biphenyls (PCBs) and chlordanes are considered in this paper from the standpoint of the uncertainty of their determination in drinking water. Using headspace solid-phase microextraction (HS-SPME) and GC-MS/MS, it was possible to reach low ng/L levels of quantification in drinking water for seven marker PCBs and two chlordane isomers, with a relative global uncertainty associated with the results of all contaminants ranging from 11 to 38%. Although the assessed relative Uncertainties of the results can be considered acceptable and may even be further improved at higher concentration ranges, they may have considerable importance for levels close to the detection limits of the method, where they may represent more than 100% of variation for the stated result.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14