微波消解-电感耦合等离子体法测定食用油中微量Pb、AS、Cd、Cu、等多种重金属元素  

Microwave digestion-inductively coupled plasma atomic emission spectrometry(ICP-AES) for the determination of Pb,As,Cd,Cu,Mg and other heavy metal elements in edible oil

作　　者：杨小媛[1] 范柯[1] 蔡羽嘉[2] 

机构地区：[1]成都市疾病预防控制中心,成都610041 [2]四川大学华西医院,成都610041

出　　处：《中国卫生检验杂志》2013年第8期1858-1861,共4页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立一种用微波消解-电感耦合等离子体法（ICP—AES）同时在线测定食用油中Pb、As、Cd、Cu、Mg等多种重金属元素方法。方法：食用油类样品直接经微波消解前处理后用ICP—AES仪测定其中Pb、As、Cd、Cu、Mg等多元素含量，并与酸消解前处理法进行测定结果的灵敏度、精密度及准确度比较。结果：本方法测定最低检出浓度与酸消解处理法无显著性差异，相关系数r可达0．9998，相对标准偏差0．61％-2．2％，加标回收率93％～102％。结论：该方法能同时测定食用油中多种重金属元素含量，方法快速，灵敏，准确度高，精密度好，适用于大批量食用油实际样品的检测需求。Objective： To establish microwave digestion plus inductively coupled plasma atomic emission spectro- metric （ICP -AES） method for the simultaneous online determination of Pb, As, Cd, Cu, Mg and other heavy met- al elements in edible oil. Methods： The edible oil sample was pretreated by direct microwave digestion and acid di- gestion respectively, then ICP - AES instrument was used for the determination of sensitivity, precision and accuracy of Pb, As, Cd, Cu, Mg and other heavy metal elements in both groups. Then the results of the two groups were compared. Results： The minimum detectable concentration is not statistically significant between microwave diges- tion group and acid digestion group. The correlation coefficient is 0. 9998. The relative standard deviation is from 0. 61% to 2.2% and the recovery rate is between 93% and 102%. Conclusion： The method of microwave digestion plus inductively coupled plasma atomic emission spectrometric （ ICP - AES） can simultaneously determine multi - heavy metals concentrations in edible oil rapidly and sensitively with high accuracy and precision. It is applicable for the determination of large quantities of edible oil.

关 键 词：微波消解 电感耦合等离子体 发射光谱 重金属 食用油 

分 类 号：O657.31[理学—分析化学]