应用ORS-ICP-MS测定欧盟食品接触塑料和容器中7种可迁移金属含量

Determination of Seven Elements in EU Food Contact Plastic Materials and Vessels by ORS-ICP-MS

根据欧盟法规10／2011食品接触材料及容器中的要求，采用带八极杆碰撞／反应池（ORS）的电感耦合等离子体质谱（ICP-MS）法测定食品接触材料及容器中Ba、Co、Cu、Fe、Li、Mn、Zn7种可迁移金属含量，通过优化ICP-MS工作条件，降低了质谱干扰，对所测定元素，相关系数均大于0．999，方法检出限为0．4～16μg／L，精密度〈3．5％，回收率在86．2％～108．5％，该方法快速，方便，该方法满足欧盟法规的检测要求，适合出口食品接触材料和容器中可迁移元素的测定。

According to the EU No.10/2011 on plastic materials and articles intended to come into contact with food, the contents of Ba, Co, Cu, Fe, Li, Mn, Zn from food contact plastic materials and articles were determined by ORS-ICP-MS. Analytical conditions of ICP-MS were op ＇tlmized in quantification to afford elimination of mass spectral interferences. For all elements, the correlation coefficient of the calibration curves was above 0.999 and the detection limits were in the range of 0.4-16 μg/L. The relative standard deviations were less than 3.5%. The recoveries are in the range of 86.2%-108.5%. The method was simple, sensitive and accurate. This method can meet the testing requirement of EU 10/2011 of food contact plastic materials and articles.