氢化物发生原子荧光法在测定土壤中浸出硒、总硒的应用

Determination of Trace Selenium in Soil By Hydride Generation-atomic Fluorescence Spectrometry

应用氢化物发生原子荧光光谱法研究了测定基地土壤中的浸出硒、总硒的技术。称取一定量土样置于烧杯中,加蒸馏水间歇手动搅拌2小时后放置过夜,取上清液测有效硒;用HNO3-HF-HClO4分解法全量消解样品,同时做全程空白实验,样品处理后加入10%硫脲-10%抗坏血酸混合改进剂以消除Cu、Ag、Ni、Pd等金属离子的干扰,并以1%硼氢化钠为还原剂,在25%的盐酸介质中测定总硒。其浸出态硒测定的检出限为1.5×10-3mg/kg,总硒测定的检出限为0.032mg/kg。

This article applied the hydride to have the atomic fluorescence spectrographic methods to study in the determination base soil effective selenium, the total selenium technology, The name takes the ration soil sample to put in the beaker, after manually adds the distilled water intermittence to stir for 2 hours to lay aside passes the night, is accepted after passing an examination the serum to measure the effective selenium; Resolution entire quantity dispels the sample with HNO3 - HF- HClO4, at the same time does the entire journey blank experiment, after the sample preparation joins 10% thiourea - 10% antiscorbutic acid mix improvement medicinal preparation by to eliminate metallic ion the and so on the Cu, Ag, Ni, Pd disturbance, and take 1% boron sodium hydride as the reducing agent, determines the total selenium in 25% hydrochloric acid medium. Its leaching condition selenium determination picks out limits for 1.5 × 10^-3 mg/kg. Its Total Selenium determination picks out limits for 0.032mg/kg.