原子荧光光谱法测定食品硒的前处理方法研究  

Study on the Pretreatment for Determination of Selenium in Food by Atomic Fluorescence Spectrometer

作　　者：屈明华[1] 汤富彬[1] 倪张林[1] 袁新跃 

机构地区：[1]中国林业科学研究院亚热带林业研究所,国家林业局经济林产品质量检验检测中心(杭州),浙江富阳311400 [2]杭州市富阳区食品安全检验检测中心,浙江富阳311400

出　　处：《分析科学学报》2015年第3期435-438,共4页Journal of Analytical Science

基　　金：国家林业公益性行业科研专项(No.201204414)

摘　　要：建立了湿法消解-原子荧光光谱法测定食品中硒。采取两种不同加热方式还原硒,实验发现：温热还原方式标准参考物的测定结果在认定值范围内,回收率为108%~114%,样品测定结果精密度良好;强热还原方式标准参考物的测定结果低于认定值,回收率偏高,样品测定结果精密度差。采用湿法消解-原子荧光法测定食品中硒,前处理过程中加入还原剂盐酸后应进行温热还原,加标回收率和精密度良好,结果准确。A method was developed for determination of selenium in food by using wet digesting method and atomic fluorescence detection.Selenium was reduced by two kinds of heating method.The thermal reduction method applied to the determination of selenium in certified reference material and the result obtained for selenium agreed quite well with the certified value.The recovery was 108%-114% with good precision.The strong heat reduction method was applied to the determination of selenium in certified reference material,with providing lower detection value,overhigh recovery and poor precision.By wet digesting atomic fluorescence detection with the reduction of sexavalent selenium by low temperature heating,satisfactory recovery,precision and accurance can be obtained.

关 键 词：原子荧光光谱法 食品 前处理 硒 

分 类 号：O657.31[理学—分析化学]