空气-乙炔火焰原子吸收分光光度法测定铅精矿中微量氧化钙

DETERMINATION OF CALCIUM OXIDE IN LEAD CONCENTRATE BY FLAME ATOMIC ABSORPTION SPECTROPHOTOMETRY

利用空气 -乙炔火焰原子吸收分光光度法研究了铅精矿中氧化钙的测定 ,采用基体匹配法消除基体铅的干扰 ,选择氯化锶与EDTA作释放剂 ,建立了铅精矿中微量氧化钙的测定方法。该法操作简便 ,精密度和准确度较好 ,方法相对标准偏差为 3.0 4% ,加标回收率在 99%～ 10

A method for determination of calcium oxide in lead concentrate was developed by flame atomic absorption spectrophotometry. The interference of lead matrix could be eliminated by adding pure lead in calcium oxide standard solutions. SrCl 2 and EDTA were selected as reliever agents. This method is simple and rapid in operation. The recovery of standard addition for calcium oxide is between 99% and 101%. The precision of calcium oxide is 3.04%. The method has been used in the determination of calcium oxide in lead concentrate. The results were satisfactory.