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食品研究与开发:2017,38(15):143-147
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南瓜籽中还原型谷胱甘肽(GSH)和蛋白巯基(P-SH)的测定
应译娴,邱岳,张小勇,崔胜云*
(延边大学理学院 化学系, 吉林 延吉 133002)
Dertermination of Reduced Glutathione(GSH) and Thiols in Proteins(P-SH) in Pumpkin Seed
YING Yi-xian, QIU Yue, ZHANG Xiao-yong, CUI Sheng-yun*
(Chemistry Department,College of Science of Yanbian University, Yanji 133002, Jilin, China)
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投稿时间:2017-04-17    
中文摘要: 用 5,5 -二硫双-2-硝基苯甲酸(5,5'-dithio-bis-2-nitrobenzoic acid,DTNB)为柱前衍生化试剂,采用细胞破 壁、衍生化为一体的同步衍生化提取,HPLC 梯度洗脱测定市售南瓜籽干品中还原型谷胱甘肽(Reduced Glutathione, GSH)和含半胱氨酸残基的含巯基蛋白(Thiol protein,P-SH)的巯基含量。结果发现南瓜籽含较丰富的 GSH 和 P-SH 的巯基,其 3 次测定均值分别为 GSH 含量为 1.045 μmol/g,P-SH 的巯基含量为 1.887 3 μmol/g。在优化的选定条件下, 该测定方法的回收率为 99.55 %~100.49 %,GSH 和 P-SH 巯基测定检测限分别为 0.138 4 μmol/g 和 0.218 4 μmol/g。
Abstract:The contents of reduced glutathione(GSH) and protein thiols(P-SH) in pumpkin seed were detect- ed by pre-column derivatization HPLC method using 5,5'-dithio-bis-2-nitrobenzoic acid(DTNB) as derivatiz- ing agent with concomitant cell rupture sample pretreatments. The results showed that detected pumpkin seed contained relatively abundant GSH and thiols in P-SH. The amounts detected were: GSH=1.045 μmol/g,thiols in P-SH=1.887 3 μmol/g respectively. The recoveries of the methods are 99.55 %-100.49 %, and detection limits are 0.138 4 μmol/g for GSH and 0.218 4 μmol/g for protein thiols. The results provided a useful data for the application of pumpkin seed for the healthcare.
文章编号:201715029     中图分类号:    文献标志码:A
基金项目:国家自然科学基金项目(21165021)
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