碰撞池-电感耦合等离子体质谱法测定食品添加剂中的微量铝  

Determination of trace aluminum in food additives by inductively coupled plasma-mass spectrometry with octopole reaction system

作　　者：王宏伟 庞艳华 张守杰 李姝慧 WANG Hong-Wei;PANG Yan-Hua;ZHANG Shou-Jie;LI Shu-Hui(Technology Center of Dalian Customs,Dalian 116001,China;Technology Center of Zhengzhou Customs,Zhengzhou 450008,China)

机构地区：[1]大连海关技术中心,大连116001 [2]郑州海关技术中心,郑州450008

出　　处：《食品安全质量检测学报》2021年第13期5191-5195,共5页Journal of Food Safety and Quality

基　　金：国家质检总局科技专项项目(2015IK169)。

摘　　要：目的建立碰撞池-电感耦合等离子体质谱法(inductively coupled plasma-mass spectrometry,ICP-MS)测定食品添加剂中微量铝含量的方法,了解市售面制食品添加剂中铝含量现状。方法采用泡打粉、酵母、小苏打等样品经过微波消解后,用氦气作为反应气,在线加入45Sc内标校正基体效应,ICP-MS测定样品中铝的含量,添加回收率来验证方法的准确性与可靠性。结果该方法的相关系数为0.9991,线性关系良好,检出限为0.08 mg/kg,回收率在86.8%~101.3%之间,相对标准偏差(relative standard deviation,RSD)≤6.62%(n=6)。结论本方法检出限低、准确度高,适用于食品添加剂中微量铝含量的测定和监控。通过对市售食品添加剂中铝的检测,部分产品存在安全隐患,相关部门需要加强这类食品添加剂的监管力度。Objective To establish a method for the determination of trace aluminum in food additives by octopole reaction system(ORS)-inductively coupled plasma-mass spectrometry(ICP-MS),and master the current situation of aluminum content in food additives for sale.Methods After microwave digestion of baking powder,yeast,baking soda and other samples,helium was used as reaction gas,45Sc internal standard was added online to correct matrix effect,and aluminum content in samples was determined by ICP-MS,and recovery was added to verify the accuracy and reliability of the method.Results The correlation coefficient of the method was 0.9991 and the linear relationship was good,and the detection limit was 0.08 mg/kg.Relative standard deviation(RSD,n=6)was less than or equal to 6.62%and recoveries from 86.8%-101.3%were obtained.Conclusion The method with advantage of low detection limit and high accuracy can be applied to the determination and monitoring of trace aluminum in food additives.There is a potential safety hazard in the exposure of aluminum in food additives,and relevant departments should strengthen supervision on the use of these additives.

关 键 词：碰撞池 电感耦合等离子体质谱法 食品添加剂 铝 评估 

分 类 号：O657.63[理学—分析化学] TS202.3[理学—化学]