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微波消解/电感耦合等离子体质谱法同时测定食品纸包装材料与食品模拟物中24种元素
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何霜,黄冰洋,寻知庆,王志雄,李姗,叶嘉荣,郭新东 广州质量监督检测研究院国家加工食品质量监督检验中心(广州) 
基金项目:广东省质量技术监督局科技立项项目(2016PZ10)
中文摘要:建立了微波消解/电感耦合等离子体质谱(ICP-MS)同时检测食品纸包装材料及3种食品模拟物(纯水、4%乙酸、10%乙醇)中Li,Be,B,Al,V,Cu,Mn,Zn,Cr,Ni,As,Sr,Zr,Se,Mo,Ag,Cd,Sn,Sb,Te,Ba,Hg,Tl,Pb 24种元素的分析方法,并对元素的迁移行为进行了研究。包装材料样品经微波消解后利用ICP-MS检测;迁移试验中的食品模拟物直接利用ICP-MS检测。在优化实验条件下,24种元素在0~1000μg/L范围内线性关系良好;方法检出限(MLOD)为0.0003~0.465mg/kg;在1.0~1000mg/kg加标水平下的平均回收率为90.5%~125.3%;相对标准偏差(RSD,n =3)为1.2%~6.8%。该方法前处理简便、灵敏准确、适用范围广,可用于食品纸包装材料中元素含量的测定及迁移行为的研究,从而为食品纸包装材料的质量监督提供了科学依据。
中文关键词:元素  食品纸包装材料  微波消解  食品模拟物  ICP-MS
 
Simultaneous Determination of 24 Elements in Food Packaging Materials and Food Simulants by Microwave Digestion/ICP-MS
Abstract:A microwave digestion combined with inductively coupled plasma mass spectrometric(ICP-MS) method was established for the simultaneous determination of 24 elements(Li,Be,B,Al,V,Cu,Mn,Zn,Cr,Ni,As,Sr,Zr,Se,Mo,Ag,Cd,Sn,Sb,Te,Ba,Hg,Tl,Pb) in food packaging paper materials and 3 kinds of food simulants(water,4% acetic acid,10% ethanol).The migration behaviors of these elements were investigated.The samples were digested by microwave and then detected by ICP-MS,and the food simulants were detected without microwave digestion. Under the optimized experimental conditions,24 elements showed good linear relationships in the range of 0-1000μg/L, with the method detection limits(MLOD) of 0.0003-0.465mg/kg.The recoveries of these analytes at spiked levels of 1.0-1000mg/kg were in the range of 90.5%-125.3% with relative standard deviations of 1.2%-6.8%.This method is simple, sensitive and accurate, and is suitable for the research on determination and migration behavior of elements in food packaging paper materials, which could provide a scientific basis for the quality supervision of food paper packaging materials.
Key Words:elements  food packaging materials  microwave digestion  food simulants  ICP-MS
引用本文:何霜,黄冰洋,寻知庆,王志雄,李姗,叶嘉荣,郭新东.微波消解/电感耦合等离子体质谱法同时测定食品纸包装材料与食品模拟物中24种元素[J].分析测试学报,2017,36(6):711-717.
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