微波消解试样-原子荧光光谱法测定土壤中硒碲

Microwave-Assisted Sample Digestion AFS Determination of Se and Te in Soil

应用HG-AFS法及微波加热试样消解法测定了土壤中硒和碲的含量，对试样消解参数、仪器工作条件及氢化物发生反应条件等作了试验并讨论。该方法测定硒及碲的检出限均为0．01μg·g^-1，荧光强度与硒及碲的质量浓度在5-100μg·L^-1及0。5～10μg·L^-1范围内呈线性关系。应用此方法分析了3个土壤试样，测定值的相对标准偏差（n=6）均小于59／5。用标准加入法作了回收试验，硒的回收率在92.0％～102.69／5之间，碲的回收率在90.19／5～98．8％之间 。

HG-AFS with micro-wave assisted sample digestion was applied to the determination of selenium and tellurium in soil. Parameters of sample digestion, working conditions of the instrument and reaction condition of hydride generation were tested and discussed. Detection limits of this method were found to be 0. 01μg·g^-1 for both elements. Linear relationships between the fluorescence intensity and concentration of Se and Te were found in the ranges of 5-100μg·g^-1 and 0. 5-10μg·g^-1respectively. The proposed method was applied to the analysis of 3 soil samples. Values of RSD＇s （n=5） found for both elements were less than 5%, and values of recovery found by standard addition method were in the ranges of 92. 0%-102. 6% （for Se） and 90. 1%-98.8% （for Te）.