【摘要】 在硝酸介质中 ,利用LaCl3 作释放剂 ,CsCl作消电离剂 ,采用空气 -乙炔火焰 ,原子吸收光度法测定工业三聚磷酸钠中钙镁的含量 ,获得了满意的结果。标准加入法的相对标准偏差为 :1.45 % (Ca)和 2 .0 3% (Mg) ,加标回收率为 :96 .7% (Mg)和 10 4.2 % (Ca)。该法可直接用于样品中微量钙镁的测定更多还原

【Abstract】 A method for FAAS determination of Ca and Mg in industrial sodium phosphate tripolymer was proposed. The interferences of (PO 4) 3- are compensated by the addition of LaCl 3 .The recoveries are 96.7% (for Mg ) and 104.2% (for Ca ) and the relative standard deviation are 1.45 % (for Ca) and 2.03% (for Mg ). The results are obtained by the standard addition method. The proposed method is proved to be rapid ,accurate and convenient.更多还原