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

摘要

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 0-1 000 μg/L,with the method detection limits(MLOD) of 0.000 3-0.465 mg/kg.The recoveries of these analytes at spiked levels of 1.0-1 000 mg/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.%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0～1 000 μg/L范围内线性关系良好;方法检出限(MLOD)为0.000 3 ～0.465 mg/kg;在1.0 ～1 000 mg/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.