污泥样品中稀土元素的检测方法研究

摘要

取稀土工业园区的污水处理设施和受影响河流的的污泥样品，分别采用三种样品预处理方法（敞开式酸溶法、石墨加热消解和微波消解法）进行对比研究，结果表明：石墨消解法前处理污泥样品后，使用ICP-MS测定其中稀土元素（Y、La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu），其方法简便快捷，检出限低，准确度好。%The sludge samples were collected from sewage treatment facilities in the rare earth industrial park and the river which was polluted by rare earth elements. Three kinds of sample pretreatment methods(open type acid dissolution meth⁃od,microwave digestion method and graphite heating digestion method)were studied and analyzed,respectively. ICP-MS was used to determine the rare earth elements(Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu). The results showed that analytical data of samples were found to meet the demands after choosing graphite heating digestion method. This method was simple with good accuracy,high sensitivity and low limit of detection.