期刊论文

Determination of trace elements in hogwash oil by inductively coupled plasma mass spectrometry with microwave digestion

中文

中国卫生检验杂志

1004-8685

2007

17

11

1993-1994+2014

10.3969/j.issn.1004-8685.2007.11.028

本校为第一机构

目的:测定地沟油中的微量元素含量.方法:采用HNO3-H2O2酸体系进行微波消解、电感耦合等离子体质谱法进行测定.结果:在优化的实验条件下,方法的检出限(3σ,n=11)为0.01～7.50 μg/L;相对标准偏差为0.30%～14.92%;标准加入回收率为88.2%～111.3%.结论:元素Fe、Cr、Zn、Mn在地沟油中含量明显超出食用油,而Hg、Sn、Co、Sb、Tl、Mo无论在食用油还是在地沟油中含量均低于检测限.

Objective：To determine the contents of trace elements in hogwash oil. Methods：Samples were analyzed by microwave digestion and inductively coupled plasma mass spectrometry. Results：A mixture of HNO3 -H2 O2 was found to give the best digestion results. Under the optimal conditions, the detection limits （3σ, n = 11 ） were in the range of 0.01 -7.50 μg/L. Relative standard deviations were in 0. 30% - 14.92%. The recoveries were in 88. 2% - 111.3%. Conclusion：The contents of Fe, Cr, Zn, Mn in the hogwash oil are much higher than t...