原子荧光光谱法测定地面水中微量砷的最佳反应条件的选择

The Optimized Reaction Conditions for Measuring Trace Arsenic in Surface Water by Atomic Fluorescent Spectrum

原子荧光光谱法测定水中微量砷时,需要选择最佳反应酸度、还原剂浓度等条件,使被测元素处于合适的价态,才能准确进行定量分析。通过实验,选择出合适的酸度和还原剂浓度,获得检出限为0.0005μg/ml,回收率在96.0～102.0%之间,相关系数r≥0.9998。

During the measuring of trace Arsenic in water it is necessary to chose the best acidity, reduction agent consistency, etc. to make the measured element to be in suitable valence and do the quantitative analysis accurately. In the experiments the best acidity and reduction agent consistency has been identified. The observing limit is 0.0005 ug/ml, recovery ratio is between 96.0-102.0 %, and the relative coefficient r≥0.9998.