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Author(s): Luis Moreira Goncalves
Joao Grosso Pacheco
Paulo Jorge Magalhaes
Jose Antonio Rodrigues
Aquiles Araujo Barros
Title: Determination of free and total sulfites in wine using an automatic flow injection analysis system with voltammetric detection
Issue Date: 2010
Abstract: An automated flow injection analysis (FIA) system, based on an initial analyte separation by gas-diffusion and subsequent determination by square-wave voltammetry (SWV) in a flow cell, was developed for the determination of total and free sulfur dioxide (SO2) in wine. The proposed method was compared with two iodometric methodologies (the Ripper method and a simplified method commonly used by the wine industry). The developed method displayed good repeatability (RSD lower than 6%) and linearity (between 10 and 250 mg l-1) as well as a suitable LOD (3 mg l-1) and LOQ (9 mg l-1). A major advantage of this system is that SO2 is directly detected by flow SWV.
Subject: Química aplicada, Análise instrumental, Outras ciências agrárias
Applied chemistry, Instrumental analysis, Other Agrarian Sciences
Scientific areas: Ciências agrárias::Outras ciências agrárias
Agrarian Sciences::Other Agrarian Sciences
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional

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