电感耦合等离子体质谱法测定食品中的有机硒  

Determination of Organic Selenium in Food by Inductively Coupled Plasma Mass Spectrometry

作　　者：龚亮[1,2] 熊珺 余以刚[2] 

机构地区：[1]广东省东莞市质量监督检测中心,广东东莞523808 [2]华南理工大学食品科学与工程学院,广东广州510640

出　　处：《食品与机械》2017年第3期62-65,共4页Food and Machinery

基　　金：广东省质量技术监督局科技项目(编号:2013ZS01);广东省科技计划项目(编号:2016B090918103)

摘　　要：建立食品中有机硒直接测定的方法。在pH值为7.0的水溶液中加入环己烷超声萃取有机硒,萃取液经微波消解后进电感耦合等离子体质谱仪测定有机硒的含量。在最佳测试条件下,方法检出限为0.45μg/kg,定量限为1.5μg/kg,试样加标回收率为93.5%~103.0%。该方法具有操作简便,精密度高,线性范围宽等优点,适用于食品中有机硒含量的测定,在实际检测中有广泛的应用前景。A method was established to direct determination of organic selenium in food.The organic selenium was extracted by adding cyclohexane in aqueous solution with pH value of 7.0,and the content of organic selenium was determined by inductively coupled plasma mass spectrometry after microwave digestion.In the best test conditions,the limit of detection and quantification were 0.45μg/kg and 1.5μg/kg,respectively.The recoveries ranged from 93.5% to103.0%.The method has many advantages such as simple operation,high precision,wide linear range and so on,and can be used for accurate determination of selenium in food.So it has a wide application prospect in practical detection.

关 键 词：电感耦合等离子体质谱 超声萃取 微波消解 有机硒 食品 

分 类 号：O657.63[理学—分析化学]