摘要
用混酸消解土壤试样，用体积分数为20％的盐酸作酸介质，质量分数为1．5％的硼氢化钾作还原剂，体积分数为1％的盐酸作载液，采用流动注射-氢化物发生三-原子吸收法定量测定土壤中的微劈砷。通过实验确定，在原子化温度为920℃、土壤中共存元素含量低于5mg／kg时对测定无干扰。该方法的榆出限为0．5μg/L，线性范嘲为5～100μg/L．相对标准偏差为0．89％，平均回收率达98．99％：
The soil sample was digested with mixed acid, and the trace arsenic in the soil was determined by flow injection-hydride generation-atomic absorption spectrometry, using hydrochloric acid with 20% of volume fraction as acidic medium, potassium borohydride with 1. 5% of mass fraction as reducing agent, hydrochloric acid with I% of volume fraction as carrier liquid. It is confirmed that the coexisting elements in the soil can not interfere with the determination when their contents are below 5 mg/kg and the atomization temperature is 920℃. The detection limit of this method is 0.5 μg/L. The linear range is 5 - 100 μg/L. The relative standard deviation is 0.89% and the recovery rate is 98.99%.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第4期382-385,共4页
Environmental Protection of Chemical Industry
关键词
流动沣射
氢化物发生
原子吸收分光光度法
砷
土壤
分析方法
flow injection
hydride generation
atomic absorption spectrometry
arsenic
soil
analysis method
