摘要
目的建立微波消解-电感耦合等离子体质谱法(inductively coupled plasma masss pectrometry,ICP-MS)测定食品接触用纸制品中铅、砷、铜等42种无机元素含量的分析方法。方法纸制品经微波消解后,各元素含量由电感耦合等离子体质谱法进行分析,在动能歧视(kinetic energy discrimination, KED)模式下增加响应值,选择锗、铑、锆、铪、铼元素作为内标校正检测结果。结果该方法可在约3.5min内完成42种元素的测定,各元素方法定量限为0.02~0.1mg/kg,且线性关系良好,r^(2)>0.995,加标回收率为80%~120%,精密度为0.3%~9.9%(n=6)。结论该方法快速、灵敏,适用于纸制餐具的无机元素检测。铬、铜、锰、锶等元素在纸杯、纸碗、纸盒中检出率较高,需引起消费者及监管部门的重视。
Objective To establish a method for the determination of lead,arsenic and copper,total 42 kinds of elements in food contact paper articles by inductively coupled plasma mass spectrometry analytical method with microwave digestion.Methods Paper sample was acid digested under microwave condition,multi elements were determined by inductively coupled plasma mass spectrometry(ICP-MS)in KED(kinect energy discrimination)mode,germanium,rhodium,zirconium,hafnium,and rhenium were used as internal elements to correct the results.The method was applied on determining general food contact paper articles in market.Results The method could analysis 42 kinds of elements determination in 3.5 minutes.The limits of quantative were in a range of 0.02‒0.1 mg/kg,regression coefficient was greater than 0.995,the recoveries was 80%‒120%,and precision are 0.3%;to 9.9%(n=6).Conclusion This method is fast,accurate,and suitable for determining paper articles.The detection rate of chromium,copper,manganese,strontium and other elements in paper cups,paper bowls and cartons is high,which needs to be paid attention to by consumers and regulatory authorities.
作者
谢苍昊
陈燕芬
刘易烨
银娜
钟怀宁
李丹
XIE Cang-Hao;CHEN Yan-Fen;LIU Yi-Ye;YIN Na;ZHONG Huai-Ning;LI Dan(Guangzhou Customs District Technology Center,Guangzhou 510070,China)
出处
《食品安全质量检测学报》
CAS
北大核心
2021年第11期4602-4607,共6页
Journal of Food Safety and Quality
基金
国家重点研发计划项目(2016YFF0203705)
广州海关项目(2020GZCK-026)。
关键词
无机元素
微波消解
电感耦合等离子质谱法
纸制品
inorganic elements
microwave digestion
inductively coupled plasma mass spectrometry
paper articles
作者简介
通信作者:李丹,研究员,主要研究方向为食品接触材料检测与评估。E-mail:lid@iqtc.cn;谢苍昊,助理工程师,主要研究方向为食品接触材料。E-mail:xiech@iqtc.cn。
