电感耦合等离子体质谱法测定食品接触塑料的迁移金属.pdfVIP

JOURNAL OF INSPECTION AND QUARANTINE 检验检疫学刊 Vol.24 No. 1 2014 年第 1 期 电感耦合等离子体质谱法测定食品接触塑料的迁移金属 罗 婵 禄春强 左 莹 孙多志 秦紫明 （上海市质量监督检验技术研究院轻工化工所 上海 200233 ） 摘要摘要 依据欧盟EU 10- 2011 《关于预期与食品接触的塑料材料和制品的委员会法规》，建立了电感耦合 138 59 63 57 7 55 等离子体质谱法测定食品接触塑料的迁移金属。选择同位素分别为： Ba 、 Co 、 Cu 、 Fe 、 Li 、 Mn 、 66 + Zn ，并采用在线内标法，同时用反应池模式去除ArO 对铁离子的干扰。7种元素分别在一定浓度范围内呈 线性，检出限为0.006-0.789 μg/L ，定量限为0.02-2.63 μg/L ，线性相关系数大于0.999 。对于食品模拟物3% 乙酸采用直接进样的方法进行检测，50% 乙醇和橄榄油采用微波消解的方法进行处理，7种元素的回收率为 93.0%-109.8%，相对偏差为5.6%-8.4% 。 关键词关键词 电感耦合等离子体质谱法；EU10-2011 ；食品接触塑料；微波消解；迁移金属 中图分类号中图分类号 O657.63 Determination of 7 Migratory Metals in Food Contact Plastics by Inductively Coupled Plasma Mass Spectrometry Luo Chan, Lu Chunqiang, Zuo Ying, Sun Duozhi, Qin Ziming (Shanghai Institute of Quality Inspection and Technical Research, Shanghai, 200233) Abstract: The method of the determination of harmful metals in food simulates, which were mentioned in EU10-2011, 138 59 63 57 7 by inductively coupled plasma mass spectrometry (ICP-MS) was proposed. The isotopes ( Ba, Co, Cu, Fe, Li, 55Mn,66Zn) were selected and internal standard method were used. Dynamic collision reaction cell (DRC) was used to overcome ArO+. Linear relationships of the 7elements were kept in defi nite ranges, with the LOD in the ranges of 0.006-0.789μg/L and the LOQ in the ranges of 0.02-2.63μg/L. Food simulates of 50% alcohol and olive oil were pretreated by microwave assisted digestion. Values of recovery and RSD’s were found in the range of 93.0%-109.8% and 5.6%-8.4%respectively. Key W