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Type: Artigo de periódico
Title: Controle da qualidade na determinação potenciométrica de sulfetos volatilizáveis por acidificação (SVA) utilizando adições de padrão
Title Alternative: Quality control in potentiometric determination of acid volatile sulfides (AVS) using standard addition
Author: Fagnani, Enelton
Guimarães, José Roberto
Grassi, Marco Tadeu
Fadini, Pedro Sérgio
Abstract: This paper presents a quality assurance and quality control protocol in order to ensure the reliability of analytical results for the determination of acid volatile sulfides in environmental samples by potentiometry. The monitoring of the ion selective sensor readings must be realized continually and particularly in this situation where the analyte is susceptible to transformation and volatilization. Potentiometry with the standard addition was presented as a rapid, accurate, precise, feasible as well as a low cost technique. Concentrations of the analyte in the range of 0.49 to 1.02 mg L-1 were tested with percentage recoveries varying from 89 to 113%.
Subject: acid volatile sulfides
quality control
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422012000400033
Date Issue: 1-Jan-2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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