摘要
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0.01～7.50μg/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 the edible oils and Hg, Sb, Tl, Mo, Sn, Co are few in any sample.
出处
《中国卫生检验杂志》
CAS
2007年第11期1993-1994,2014,共3页
Chinese Journal of Health Laboratory Technology
关键词
微波消解
电感耦合等离子体质谱
地沟油
微量元素
Hogwash oil
Microwave digestion＇
Inductively coupled plasma mass spectrometry
Trace elements
