ICP-OES法测定深圳市面制食品中铝

目的建立面制食品中铝的ICP-OES测定方法,应用测定深圳市2009年10类面制品中铝含量,对其卫生质量状况进行评价。方法样品经硝酸高压消解后,用ICP-OES法测定其中的铝,卫生学评价按面制食品中铝限量卫生标准GB2762-2005进行。结果方法线性范围为0～10mg/L,线性相关系数为0.99996,方法检出限为2.2mg/kg,精密度为2.2%～3.8%之间,回收率在93.7%～103.8%之间。共检测10类491份面制食品,合格338份,合格率68.8%。其中饼、面包、汉堡包三类面制品中铝含量全部合格,油条等其它7类面制品合格率分布在22.2%～63.3%之间。结论 ICP-OES法测定面制品中铝准确可靠,线性范围广。深圳市部分面制品中铝含量超标严重,与制作过程中过量使用含铝添加剂有关。

Determination of aluminum in flour products by ICP-OES in Shenzhen City

Aim To determine aluminum in flour products.Methods The samples were detected by ICP-OES Results The calibration curve showed good linearity in the range of 0～10mg/L with correlation of 0.99996,the detection limit was 2.2mg/kg,the recoveries were between 93.7%～103.8%,and the precision ranged from 2.2% to 3.8%.338 qualified foods were detected from 491 food samples,the qualified rate was 68.8%,the aluminum contents were between 5.0～1200 mg/kg.The qualified rate of pancakes、bread and Hamburg was 100%,the other seven sorts of flour products range from 22.2% to 63.3%.Conclusions The method showed wide linear range,good precision and accuracy.