电感耦合等离子体质谱法同时测定与食品接触陶瓷制品中12种元素溶出量

Simultaneous determination of 12 elements extraction from ceramic articles in contact with foodstuffs by inductively coupled plasma-mass spectrometry

目的建立电感耦合等离子体质谱法（ICP-MS）同时快速测定与食品接触陶瓷制品铅、镉、镍、铬、砷、锑、锌、钴、铜、锰、铝、钡等12种元素溶出量的分析方法。方法采用4%醋酸溶液,在（22±2）℃室温条件下避光浸泡样品24 h±20 min,以45Sc、72Ge、115In、209Bi作为内标,优化仪器参数和试验条件,用电感耦合等离子体质谱法同时测定浸泡液中12种元素溶出量,内标法定量。结果该方法的检出限为0.10~10.0μg/L,样品的加标回收率为90.0%~106.0%,相对标准偏差0.86%~4.31%。结论方法操作简便,准确度好,灵敏度高。可适用于食品接触陶瓷多种痕量有毒有害元素溶出量的检测。

Objective To establish a method for the simultaneous determination of 12 elements extraction from ceramic articles in contact with foodstuffs by inductively coupled plasma-mass spectrometry （ICP-MS）. Methods Samples were soaked in 4% acetic acid for 24 h±20 min at 20-24 ~C. Then content of 12 elements in leaching solution were determined by ICP-MS under the optimized conditions, using 45Sc, 72Ge, 115In and 209Bi as internal standard. Results The limits of detection were 0.1-10.0μg/L. The recoveries ranged from 90.0% to 106.0%, and the RSD were 0.86%-4.31%. Conclusion The established method has the advantages of simple operation, fine accuracy and high sensitivity. It can be applied for the detection of trace poisonous and harmful dissolubility elements from ceramic articles in contact with foodstuffs.