鲁 丹，赵珊红，邹学权

（浙江出入境检验检疫局技术中心，浙江杭州310017）

顺序注射-HG-AFS法同时测定食品接触材料中痕量砷和锑的迁移量

鲁 丹，赵珊红，邹学权

（浙江出入境检验检疫局技术中心，浙江杭州310017）

采用L-半胱氨酸为预还原剂，建立了顺序注射-氢化物发生-原子荧光光谱法同时测定食品接触材料中痕量砷和锑迁移量的检测方法。研究了L-半胱氨酸浓度、介质酸度、载流酸度、硼氢化钠浓度及共存元素的影响。砷和锑的检出限分别为0.038、0.040μg/L，测定低限度都为0.001mg/L，回收率范围分别为95.6%～102%和96.3%～103%，相对标准偏差分别为2.64%～4.09%和2.33%～4.18%（n=8）。方法灵敏、简便、快速、准确，适用于进出口食品接触材料中痕量砷和锑迁移量的同时测定。

L-半胱氨酸，顺序注射-氢化物发生-原子荧光光谱法，食品接触材料，痕量砷和锑迁移量

Abstract：A method for the simultaneous determination of migration of trace As and Sb in food contact materials by sequential injection-hydride generation-atomic fluorescence spectrometry with L-cysteine as a prereductant was developed.The influence factors such as L-cysteine，the acidity of sample solution and carrier liquid，the concentrations of NaBH4and the interference of coexistent elements were investigated.The detection limits were 0.038 and 0.040μg/L，the LOQ were both 0.0010mg/L，the recoveries were in the ranges of 95.6%～102%and 96.3%～103%，and the relative standard deviations were 2.64%～4.09%and 2.33%～4.18%（n=8） for As and Sb respectively.The method was sensitive，simple，quick and accurate，which could be used for determination of migration of trace As and Sb in food contact materials.

Key words：L-cysteine；sequential injection-hydride generation-atomic fluorescence spectrometry；food contact materials；migration of trace As and Sb

随着全球范围对食品接触材料安全的日益关注和重视，一些发达国家不断降低食品接触材料中有害元素的迁移限量值，因此对有害元素迁移量的检测技术提出了更高的要求。砷和锑是对人体健康极具危害性的物质，国内外食品接触材料对砷和锑迁移量都有严格的限量要求，不锈钢食具容器及铝制食具容器中砷迁移限量值为0.04mg/L，聚对苯二甲酸乙二醇酯（PET）食具容器中锑的迁移限量值为0.05mg/L。最近，韩国又要求出口至韩国的搪瓷制品中锑的迁移限量值降低十倍，即为0.07mg/L。由于限量要求低，常规的砷斑法[1-2]、孔雀绿分光光度法[3]和电感耦合等离子体发射光谱（ICP-OES）法[4]灵敏度和稳定性不足，难以满足限量要求。……