【摘要】 叙述了石墨杯炉原子吸收法测定土壤样品中银与镉的实验 ,并对有关问题进行评述 .以HF HNO3 H2 SO4 分解样品 ,在 φ(HCl) =2 0 %介质中进行测定 ,解决了实际分析中的一些重要问题 .实验结果表明 ,对 0 .50 0 g称样的 50 .0ml分析溶液而言 ,银与镉的最低可测浓度分别为 0 .0 0 82 μg/g与 0 .0 0 52 μg/g .对含银与镉分别为 0 .60 μg/g与 0 .2 0 μg/g样品的相对标准偏差为 4 .4 %与 2 .9% .更多还原

【Abstract】 An experiment on determination of silver and cadmium in soil samples with atomic absorption spectrometry is described in graphite cup furnace and the concerned problems is then reviewed. Soil samples is dissolved with HF HNO 3 H 2SO 4 and measured in medium of 20% HCl. Some important problems are solved in the actual analysis. For a 0.500 g sample with 50.0 ml volume of analytical solution, the minimum measurable concentration of silver and cadmium is 0.008 2 and 0.005 2 μg/g, respectively. Relative standard deviation for 0.60 and 0.20 μg/g contents of silver and cadmium in soil sample is 4.4% and 2.9%, respectively.更多还原