饮用水中铝的石墨炉原子吸收测定方法优化  

Optimization of Graphite Furnace Atomic Absorption Spectrophotometry in Determination of Aluminum in Drinking Water

作　　者：孙敏[1] 付永华[1] 林涛[1] 周华[1] 

机构地区：[1]河海大学环境学院,江苏南京210098

出　　处：《中国给水排水》2010年第22期95-97,共3页China Water & Wastewater

基　　金：国家科技支撑计划项目(2006BAB17B02)

摘　　要：探讨了采用石墨炉原子吸收法测定饮用水中铝含量时热解涂锆石墨管的制备方法和硝酸镁基体改进剂的用量，以及热解涂锆石墨管的原子吸收分光光度法的仪器工作条件。结果表明：热解涂锆石墨管比普通石墨管的使用寿命长；在0．0～100．0μg/L的测量范围内，当水样中硝酸镁含量为0．5％时，加标回收率为97．90％～100．4％。该方法检出限低、精密度高、稳定性好，可作为给水厂的水源水、过程水和出厂水中铝的检测方法。A discussion is made on the preparation method of pyrolytic zirconium-coated graphite tube and dosage of magnesium nitrate as a matrix modifier as well as instrument conditions of pyrolytic zirconium-coated graphite tube atomic absorption spectrophotometry when determining aluminum in drinking water by graphite furnace atomic absorption speetrophotometry. The results show that the pyrolytic zirconi- um-coated graphite tube has longer life than ordinary graphite tube. In the measuring range of 0.0 to 100.0μg/L, the recoveries of standard addition are 97.9% to 100.4% when the content of magnesium nitrate in water samples is 0.5%. The method has low detection limit, high precision, and good stability, and it can be used in determination of aluminum in source water, process water and finished water of water supply plant.

关 键 词：铝 热解涂锆石墨管 原子吸收分光光度法 基体改进剂 

分 类 号：TU991.2[建筑科学—市政工程]