前言由于基体效应的影响,直接测定高纯氯化钠中微量金属杂质是很困难的。萃取光谱法广泛用于高纯碱金属化合物的分析[1-4]。为了一次同时测定碱金属化合物中多种金属杂质,常采用混合有机萃取剂分离基体(碱金属元素)后杂质浓缩物用少量碳粉或碳粉与氯化钠的混合物吸附,以直流电弧粉末法测定,方法的检出限可达10~(-5)— Preface Due to the effect of matrix effect, it is very difficult to directly measure trace metal impurities in high purity sodium chloride. Extraction spectroscopy is widely used in the analysis of high purity alkali metal compounds [1-4]. In order to simultaneously determine a variety of metal compounds in the alkali metal impurities, often mixed organic extractant used to separate the matrix (alkali metal elements) after the impurity concentrate with a small amount of carbon powder or a mixture of carbon and sodium chloride adsorption, DC arc powder method Determination, the detection limit of the method up to 10 ~ (-5) -