微波消解-火焰原子吸收光谱法测定三峡库区鲤鱼中4种重金属元素

Determination of four kinds of metal elements in carp in the Three Gorges Reservoir by FAAS with microwave digestion

建立鲤鱼中4种重金属元素的微波消解-火焰原子吸收测定的方法。利用微波消解处理鲤鱼样品,使用火焰原子吸收光谱方法测定鲤鱼中Pb、Cd、Cu和Cr的含量。结果显示,鲤鱼中Pb、Cd、Cu和Cr含量分别为0.361、0.153、5.860、1.273μg/g,除Cd以外,均在国家限量范围之内;方法检测线为0.01~0.12μg/g,精密度试验RSD为1.74%~4.56%,重复性试验RSD为2.89%~5.76%,加标回收率为94.1%~121.5%;与国标检测方法相比,该方法检测速度快、精密度高。因此,该测定方法操作简单、速度快,灵敏准确,可用于三峡库区鲤鱼中4种重金属元素的测定。

To establish the detecting method for four heavy metal elements in carp by flame atomic absorption spectrometry （FAAS） with microwave digestion. The carp samples were digested by microwave digestion, the concen- tration of Pb, Cd, Cu and Cr in carp were detected by flame atomic absorption spectrometry. Results showed the aver- age concentration of Pb, Cd, Cu and Cr in carp was 0. 361,0. 153,5. 860,1. 273 μg/g. The detected levels of stud- ied metals were below the legal national limited standards except Cd. The detection limits was 0.01 -0.12μg/g,the RSD of the precision test was 1.74% -4.56% , the repeatability test was 2.89% -5.76% and the recovery rate of samples was be Lween 94. 1% -121.5%. Compared with the national standard, this method is more fast and accu- rate. Therefore, the advantages of this method are simple, rapid, accurate and can be used for the detection of four heavy metal elements in carp in the Three Gorges Reservoir area.