饮用水中铝的流动注射分析测定法

目的 建立饮用水中铝的流动注射分析测定法.方法 在六亚甲基四胺缓冲溶液(pH=6.0)中,以邻菲啰啉和抗坏血酸为掩蔽剂,使铝离子与铬天青S反应生成络合物,在550 nm波长下进行流动注射分析.结果 在5～200μg/L范围内,该方法所得线性方程为:y=2.05×10~5x-1.47×10~4,其相关系数为0.999 3,检出限为2.0μg/L,平均回收率在92.2%～108.0%之间,RSD在2.5%～8.2%之间.结论 该方法简单、快捷、准确,适用于饮用水中铝含量的测定.

Abstract：

Objective To establish a method for the determination of aluminium in drinking water by flow injection analysis instrument.Methods In a hexamine buffer solution(pH=6.0),phenanthroline solution and ascorbic acid as the anti-interference agent,aluminium could react with chrolnazurol S solution and form a compound,of which maximum absorption was at 550 nm.Results The linear range for this method was 5-200μg/L.11le correlation coefficient was 0.999 3,the detection limit of this method was 2.0 μg/L,the recovery rates were in the range of 92.2%-108%and RSD were in the range of 2.5%-8.2%.Conclusion The flow injection method is simple,rapid,accurate and is applicable to the determination of aluminium in drinking water.

Determination of Aluminium in Drinking Water by Flow Injection Analysis Instrument

Objective To establish a method for the determination of aluminium in drinking water by flow injection analysis instrument.Methods In a hexamine buffer solution(pH=6.0),phenanthroline solution and ascorbic acid as the anti-interference agent,aluminium could react with chrolnazurol S solution and form a compound,of which maximum absorption was at 550 nm.Results The linear range for this method was 5-200μg/L.11le correlation coefficient was 0.999 3,the detection limit of this method was 2.0 μg/L,the recovery rates were in the range of 92.2%-108%and RSD were in the range of 2.5%-8.2%.Conclusion The flow injection method is simple,rapid,accurate and is applicable to the determination of aluminium in drinking water.