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用盐酸加热溶解四氧化三锰样品 ,加入镧盐和锶盐混合释放剂 ,消除 70 %左右基体锰的干扰 ,直接测定其中钙、镁含量 ,样品加标回收率为 96 8%～ 98 2 % ,相对标准偏差为 2 4%～ 3 2 % .
The samples were heated and dissolved with hydrochloric acid to dissolve the sample of MnO 4, and the mixture of lanthanum and strontium salts was added to eliminate the interference of about 70% manganese matrix. The content of calcium and magnesium was determined directly. The spiked recoveries were 96 8% -98 2% , Relative standard deviation of 24% ~ 32%.