电感耦合等离子体质谱法检测塑料饮用吸管中金属元素的-食品科学.pdf

276 2018, Vol.39, No.08 食品科学 ※安全检测 电感耦合等离子体质谱法检测塑料饮用吸管中 金属元素的迁移量 周 静，钱亮亮，冯洪燕，郭 瑛，周文静 （连云港市质量技术综合检验检测中心，江苏连云港 222006 ） 摘  要：为了解市售塑料饮用吸管中金属元素在使用过程中的迁移情况，建立电感耦合等离子体质谱法测定吸管中 Al 、As 、Ba 、Cd 、Cu 、Fe 、Mn 、Ni 、Pb 、Zn 的迁移量。该方法线性相关系数达0.999 9 ，回收率在88.7%～98.3% 范围内，精密度为1.2%～9.4%，均能满足检验要求。结果表明，71 批次市售吸管中Ba 、Cu 、Mn 、Zn迁移量全部 符合GB 9685—2008 《食品容器、包装材料用添加剂使用卫生标准》要求，但部分批次的Al 、Ni 、Pb迁移量超过 GB 5749—2006 《生活饮用水卫生标准》限量值，超标率分别为23.9%、60.6%和39.4%，有个别批次吸管Pb迁移量 高达标准限量值的37.6 倍。说明塑料饮用吸管中的金属元素可迁移到饮用介质中，经常使用存在潜在的安全风险。 关键词：塑料饮用吸管；金属元素；迁移量；检测；电感耦合等离子体质谱 Determination of the Migration of Harmful Metals from Plastic Drinking Straw by Inductively Coupled Plasma Mass Spectrometry ZHOU Jing, QIAN Liangliang, FENG Hongyan, GUO Ying, ZHOU Wenjing (Comprehensive Center of Lianyungang for Quality and Technical Inspection and Testing, Lianyungang 222006, China) Abstract: A method for determining the migration of Al, As, Ba, Cd, Cu, Fe, Mn, Ni, Pb and Zn from plastic drinking straws was established by inductively coupled plasma mass spectrometry (ICP-MS). The method presented good linearity with correlation coefficients of 0.999 9, and the recoveries were in the range of 88.7% to 98.3% with relative standard deviations (RSD) of 1.2% to 9.4%. Thus this method met the analytical requirements. The results for 71 samples of commercially available straws showed the migration amounts of Ba, Cu, Mn and Zn all conformed to the national standard Hygiene Standards of Uses of Additives in Food Containers and Packaging Materials (GB 9685-2008), while the migration amounts of Al, Ni and Pb exceeded the national standard limit according to Drinki