Determination of free and total sulfites in wine using an automatic flow injection analysis system with voltammetric detection

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Luis Moreira Goncalves (Autor) Outra; Joao Grosso Pacheco (Autor) Outra; Paulo Jorge Magalhaes (Autor) Outra; Jose Antonio Rodrigues (Autor) FCUP; Aquiles Araujo Barros (Autor) FCUP

Revista

Título: Food Additives and Contaminants - Part A Chemistry, Analysis, Control, Exposure and Risk Assessment

Vol. 27

Páginas: 175-180

ISSN: 1944-0049

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 40 Citações

Scopus - 40 Citações

Classificação Científica

FOS: Ciências agrárias > Outras ciências agrárias

CORDIS: Ciências Físicas > Química > Química aplicada ; Ciências Físicas > Química > Análise instrumental

Outras Informações

ID Authenticus: P-003-AYX

DOI: 10.1080/19440040903261547

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6