环境水样中钾的连续流动分析法

Determination of Potassium in Environmental Water Samples by Continuous Flow Analysis

目的建立环境水样中钾的连续流动分析方法。方法用ALLIANCE自动分析仪测定环境水样中的钾,并与原子吸收法作了对照。结果方法的检出限为0.5μg/mL,在浓度5～1000μg/ml范围内呈线性关系,加标回收率在97%～102%之间,相对标准偏差为0.82%～1.23%。结论连续流动分析方法可准确、快速地测定环境水样中的钾。

Objective To establish a continuous flow analytical method for determination of potassium in environmental water sample.Methods The concentration of patassium in environmental water sample was determined by ALLIANCE auto-matic analyzer,and its data were compared with the data obtained from atomic absorption spectrophotometry.Results The de-tection limit of this method was0.5μg /ml.The method revealed linear relationship at the potassium concentrations of5-1000μg /ml.The recovery rate of standard addition method ranged from to97%to102%.The relative standard deviations were0.82%-1.23%.Conclusion The contents of potassium in environmental water samples could be accurately and rapidly deter-mined by continuous flow analysis.