食品科学 ›› 2018, Vol. 39 ›› Issue (8): 276-281.doi: 10.7506/spkx1002-6630-201808043

• 安全检测 • 上一篇    下一篇

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   

  1. (连云港市质量技术综合检验检测中心,江苏?连云港 222006)
  • 出版日期:2018-04-25 发布日期:2018-04-17
  • 基金资助:
    江苏省质量技术监督局产品质量监督抽查(风险监测)项目(322015100002)

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   

  1. (Comprehensive Center of Lianyungang for Quality and Technical Inspection and Testing, Lianyungang 222006, China)
  • Online:2018-04-25 Published:2018-04-17

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

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 Drinking Water Health Standards (GB 5749-2006) by 23.9%, 60.6% and 39.4%, respectively. In only a few samples the migration of Pb exceeded by 37.6 times. These results indicated that since metals could migrate from plastic drinking straws to the drink, regular use of plastic drinking straws poses potential safety risks.

Key words: plastic drinking straws, element migration, migration amount, determination, inductively coupled plasma mass spectrometry (ICP-MS)

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