摘要
采用HNO3-H202微波消解样品，ICP—OES法测定食品包装纸中铅和砷。探讨了最佳的微波消解参数，优化了实验条件。结果表明，该方法的检出限Ph为0．021mg·L-1、As为0．036mg·L-1，相对标准偏差均小于5％，加标回收率铅为96．1％-101．5％；砷为94．9％～99．0％。该方法具有简便、快速、准确和灵敏度高的优点，适用于食品包装纸中铅和砷的测定。
Lead and arsenic content in food wrappers was determined by ICP-OES after microwave digestion with a mixture of nitric acid and hudrogen peroxide.The optimal digestion procedure was discussed and the param- eters were optimized.The detection limit of the method Pb was 0.021mg＇L-1, As was 0.036 mg＇ L-1,Relative stan- dard deviation less than 5%,Standard addition recovery of Pb was 96.1% -101.5%;As was 94.9%~99.0%.The re- suits indicated that the method which was simple,rapid,accurate,and highly sensitive,can be used for the determi- nation of lead and arsenic in food wrappers.
出处
《化学工程师》
CAS
2013年第9期22-24,共3页
Chemical Engineer
