文献类型：期刊文献

英文题名：Online matrix elimination and high-sensitivity detection of maleic hydrazide in complex vegetable matrices using 2D-IC-IPAD

作者：Luan, Shaorong[1];Xu, Meijie[1];Lin, Haiyan[1];Huang, Qingchun[2]

机构：[1]East China Univ Sci & Technol, Res Ctr Anal & Test, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab Chem Biol, Shanghai 200237, Peoples R China

年份：2026

卷号：522

外文期刊名：FOOD CHEMISTRY

收录：;EI(收录号：20262420905816);WOS:【SCI-EXPANDED(收录号:WOS:001800261600001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (32372588) .

语种：英文

外文关键词：Maleic hydrazide; Two-dimensional ion chromatography; Integrated pulsed amperometric detection; Online matrix elimination; Valve-switching; Food safety

摘要：Maleic hydrazide (MH), a sprout inhibitor with potential toxicological risks, necessitates sensitive detection in vegetables. This paper introduced a novel two-dimensional ion chromatography system coupled with integrated pulsed amperometric detection (2D-IC-IPAD). MH fraction was heart-cut from the first-dimension separation by a valve-switching program, removing bulk matrix interferences. After transfer to a second-dimension column, MH was sensitively detected by IPAD. Recoveries of 95.85-100.9% were obtained in potato, onion, and garlic using methanol extraction. Excellent linearity (0.1521-10.14 mg/L, R-2 = 0.9992) was achieved, with detection and quantification limits of 0.05 and 0.15 mu g/g, respectively. Intra-day precision was <6% RSD. In real samples, MH was quantified at 0.86 mu g/g in onions but was below the detection limit in potatoes and garlic. This 2D-IC-IPAD system is studied for the first time, providing a high-throughput, fully automated platform with online matrix elimination for MH detection with low operational error, low cost, and high accuracy.