稻米中无机砷的提取与测定  

The extraction and determination of inorganic arsenic in rice

作　　者：何颖[1,2] 王世平[1] 

机构地区：[1]中国农业大学食品科学与营养工程学院,北京100083 [2]北京吉天仪器有限公司,北京100015

出　　处：《现代仪器》2011年第5期87-90,86,共5页Modern Instruments

摘　　要：通过与无机砷的2种国标提取方法的实验对比,建立高效、快速的微波辅助提取稻米中无机砷的方法,以0.3mol/L盐酸为提取剂,在60℃、固液比1:20的条件下微波加热提取15min,并用1%的L-半胱氨酸完成对As(V)的预还原。方法回收率为As(Ⅲ):94%～108%、As(V):92%～101%,精密度为2.94%,检出限为0.086μg/L,可准确用于稻米中有毒无机砷的定量检测和风险评估。An efficient and rapid microwave-assisted extraction method of in organic arsenic in rice was established. The process was： 0.3mol/L hydrochloric acid serves as extracting agent, under T=60%2, solid-liquid ratio was 1：20, microwave-assisted extraction for 15rain, As（Ⅴ） was reduced by 1% L-cysteine. By this process, recovery rate of As（Ⅲ） and As（Ⅴ） were 94%-108% and 92%-101%. respectively, precision bias was 2.94% and the detection limit was 0.086μg/L. This process might apply accurately in quantitative detection and risk evaluation of toxic inorganic arsenic in rice.

关 键 词：稻米 无机砷 微波辅助提取 

分 类 号：TS207.5[轻工技术与工程—食品科学]