采用自动流动注射分析系统与伏安检测法测定葡萄酒中的游离亚硫酸盐和总亚硫酸盐。

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

机构信息

REQUIMTE-Departamento de Quimica, Faculdade de Ciencias, Universidade do Porto, 4169-007 Porto, Portugal.

出版信息

Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2010 Feb;27(2):175-80. doi: 10.1080/19440040903261547.

DOI:10.1080/19440040903261547

PMID:20013444

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 (SO(2)) 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 SO(2) is directly detected by flow SWV.

摘要

一种基于气扩散初步分离分析物并随后在流动池中采用方波伏安法（SWV）进行后续测定的自动化流动注射分析（FIA）系统，被开发用于测定葡萄酒中的总二氧化硫（SO2）和游离二氧化硫（SO2）。所提出的方法与两种碘量法（Ripper 法和葡萄酒行业常用的简化方法）进行了比较。所开发的方法显示出良好的重复性（RSD 低于 6%）和线性（10 至 250mg/L 之间），以及适当的检出限（3mg/L）和定量限（9mg/L）。该系统的一个主要优点是 SO2 可通过流动 SWV 直接检测。