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qi xiang se pu fa ce ding mi fen zhong de wei liang dian
Author(s): 
Pages: 42
Year: Issue:  5
Journal: The Light & Textile Industries of Fujian

Keyword:  米粉气相色谱法;
Abstract: 建立了一种测定米粉中碘的气相色谱方法,利用淀粉酶去除淀粉,利用乙酸锌和亚铁氰化钾作为沉淀荆去除样品中的蛋白质,在硫酸环境下用重铬酸钾将碘离子氧化为游离碘,与丁酮反应生成碘代丁酮(3-碘-2丁酮),再用正己烷萃取,气相色谱检测,外标法定量.结果在所考察的浓度范围内具有良好的线形关系,相关系数r=0.9999.方法回收率在90.0%-102.1%之间,变异系数小于9.5%,检测限为0.01mg/kg.
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