Zn-DDTC共沉淀预富集火焰原子吸收光谱法测定水中微量镍  

FAAS DETERMINATION OF MICROAMOUNTS OF NICKEL IN WATER -- PRECONCENTRATION BY Zn-DDTC COPRECIPITATION

作　　者：王晓[1] 关淑霞[1] 

机构地区：[1]广东省南海市南海发展股份有限公司水质部,南海528200

出　　处：《理化检验（化学分册）》2004年第6期347-348,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：探讨了以Zn DDTC为共沉淀载体,共沉淀富集水中微量镍的方法,用火焰原子吸收光谱法测定镍,提高了灵敏度,选择性高,操作简便,方法检出限为3.78μg·L-1,相对标准偏差为3 92%～6.47%,回收率为95.8%～103.0%,用于测定自来水和其水源水中微量镍,结果满意。Microamounts of nickel(Ⅱ) in water samples were preconcentrated by coprecipitation with Zn-DDTC as co-precipitant at pH 7.5～8.5. After filtration on PTFE filter-membrane the precipitate was dissolved in dilute nitric acid and hydrogen peroxide. Nickel(Ⅱ) in the solution was finally determined by FAAS. Detection limit of the method was found to be 3.78μg·L^(-1). In the application of this method to the analysis of samples of tap water and headwaters. RSD′s and recoveries found were in the ranges of 3.92%～6.47% and 95.8%～103.0% respectively.

关 键 词：火焰原子吸收光谱法 共沉淀预富集 微量镍 Zn—DDTC 自来水 水源水 

分 类 号：O657.31[理学—分析化学]