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

• Type: Article in International Scientific Journal
• Date: 2010

Authors

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

Journal

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

Vol. 27

Pages: 175-180

ISSN: 1944-0049

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 40 Citations

Scopus - 40 Citations

Scientific classification

FOS: Agrarian Sciences > Other Agrarian Sciences

CORDIS: Physical sciences > Chemistry > Applied chemistry ; Physical sciences > Chemistry > Instrumental analysis

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6