摘要
建立了电感耦合等离子体质谱(ICP-MS)法测定鱼油中Cr、Co、Ni、As、Mo、Cd、Sn、Sb、Hg、Pb等10种重金属元素的分析方法。采用微波消解法消解样品后直接进行分析,应用碰撞/反应池(ORS)技术有效地消除了多原子离子对待测元素的干扰,选用Sc、Rh、Bi等元素为内标混合液校正基体干扰和漂移。结果表明,该方法的检出限为0.008～0.073μg/L,相对标准偏差均小于4.4%,通过添加标准回收实验,回收率在89.6%～103.8%。该法简便、快速,能满足鱼油中多种微量重金属元素同时测定的分析需求。
An octopole reaction system（ORS） inductively coupled plasma mass spectrometry（ICP-MS） was developed for the determination of Cr, Co, Ni, As, Mo, Cd, Sn, Sb, Hg and Pb in fish oil. Samples were decomposed by HNO3 and H202 followed by dilution with ultrapure water then the above 10 heavy metal elements in the solution were analyzed directly by ICP-MS. The use of ORS can eliminate the interference of polyatomic ions dramatically. Sc, Rh and Bi were used to correct the matrix interference and drift. The detection limits of the 10 elements was in the range of 0.008-0.073 μg/L, the relative standard deviation was less than 4.4% for all the elements, and the recovery was 89.6%-103.8% by adding standard recovery experiment. This method was rapid, simple and applicable for the analysis of trace heavy metal elements in fish oil.
出处
《食品科技》
CAS
北大核心
2012年第10期273-275,278,共4页
Food Science and Technology
基金
重庆市自然科学基金项目(cstc2012jjA0108)
关键词
电感耦合等离子体质谱
鱼油
碰撞/反应池
重金属元素
inductively coupled plasma mass spectrometry（ICP-MS）
fish oil
octopole reaction system （ORS）
heavy metal elements
