文献类型：期刊文献

英文题名：Rapid Determination of Low-level Sulfite in Dry Vegetables and Fruits by LC-ICP-MS

作者：Ni, Zhanglin[1] Tang, Fubin[1] Liu, Yihua[1] Shen, Danyu[1] Mo, Runhong[1]

第一作者：倪张林

通信作者：Tang, FB[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China

年份：2015

卷号：21

期号：1

起止页码：1-6

外文期刊名：FOOD SCIENCE AND TECHNOLOGY RESEARCH

收录：;EI(收录号：20151700777424);Scopus(收录号：2-s2.0-84928008859);WOS:【SCI-EXPANDED(收录号:WOS:000349580200001)】；

基金：This work was supported by the Special Funds from the Central Scientific Research Institute of Public Welfare (RISF2013011), Special Fund for Forestry Scientific Research in the Public Interest (201304705).

语种：英文

外文关键词：Sulfite; dry vegetables and fruits; LC-ICP-MS

摘要：This paper describes a liquid chromatography inductively coupled plasma mass spectrometry (LC-ICP-MS) method for the determination of low-level sulfite in dry vegetables and fruits. Aqueous 0.1% solution of formaldehyde was chosen as extraction solution for releasing the bound sulfite and forming the more stable hydroxymethanesulfonate (HMS). Sulfite was separated using an anion exchange column with isocratic elution by a 50 mmol.L-1 ammonium nitrate in 0.1% formaldehyde solution (pH 7). Sulfite was detected as (SO+)-S-32-O-16 by ICP-MS in DRC O-2 gas mode. In the optimum conditions, the linearity of the method is 0.05 - 5 mg.L-4 for sulfite, and the detection limit is 0.02 mg.L-1. The results demonstrated that the method achieved acceptable quantitative recoveries of 78.5% to 91.6% with relative standard deviations (RSDs) < 5%. Compared to the AOAC official method, the proposed method presented advantages of rapid and sensitive.