电感耦合等离子体质谱法测定食品用纸制品中6种重金属的含量

Determination of 6 kinds of heavy metals in food paper products by inductively coupled plasma mass spectrometry

中文关键词:  电感耦合等离子体质谱法  食品用纸制品  微波消解  重金属

英文关键词:inductively coupled plasma mass spectrometry  food packing paper  microwave digestion  heavy metal

中文摘要:

      目的 了解2018年云南省部分地州市售食品用纸制品中铅(Pb)、镉(Cd)、砷(As)、汞(Hg)、锑(Sb)、铬(Cr)6种重金属污染情况。方法 采集云南省10个地州接触食品的纸袋、纸盒、纸桶、纸杯、纸碗、纸碟、纸盘、包装纸、垫纸、食品加工纸等样品共100件, 称取经粉碎样品0.1 g于微波消解罐中, 加入5 mL硝酸, 0.5 mL氢氟酸, 放置过夜, 消解赶酸后, 使用电感耦合等离子体质谱仪检测。结果 检出率最高的是Cr和Pb, 分别为100%和97%, Hg检出率为92%, Sb检出率为88%, Cd检出率为72%, As检出率为23%, 且As超标1件, Pb超标3件。结论 云南省市售食品用纸制品中重金属Pb、Cd、As、Hg、Sb、Cr检出率较高, 存在安全隐患, 相关部门应高度重视并加强监管。

英文摘要:

      Objective To investigate the pollution of lead (Pb), cadmium (Cd), arsenic (As), mercury (Hg), antimony (Sb) and chromium (Cr) in food paper products in some cities of Yunnan province in 2018. Methods A total of 100 pieces of paper bag, paper box, paper bucket, paper cup, paper bowl, paper plate, paper plate, wrapping paper, pad paper and food processing paper were collected from 10 prefectures in Yunnan province. Then 0.1 g samples were weighed and crushed in a microwave digestion tank, 5 mL nitric acid and 0.5 mL hydrofluoric acid were added and placed overnight. After digestion and acid removal, the samples were detected by inductively coupled plasma mass spectrometry. Results The highest detection rates were Cr and Pb, which were 100% and 97%, respectively. The detection rates of Hg, Sb, Cd, As were 92%, 88%, 72%, 23%, respectively, and 1 case exceeded the standard for As and 3 cases exceeded the standard for Pb. Conclusion The detection rate of heavy metals Pb, Cd, As, Hg, Sb and Cr in food paper products sold in Yunnan province is relatively high and there are safety risks. Relevant departments should attach great importance to it and strengthen supervision.