火焰原子吸收法测定铅钙合金中的钙

ON DETERMINATION OF CA IN PB-CA ALLOY BY FLAM ATOMIC ABSORPTION

将铅钙合金试样用硝酸溶解 ,盐酸分离基体后 ,在 1mg/ml的氧化镧的增感作用下 ,在原子吸收分光光度计上采用空气 -乙炔火焰进行钙的测定。在 0 .5 μg/ml～ 5 .0 μg/ml线性范围内 ,回收率为 96 %～ 10 2 % ,相对标准偏差小于 5 .0 %。

Separating Ca from substate of Pb by using nitric acid,Ca could be determined by atomic absorption using O 2-C 2H 2 flame with La 2O 3 of 1mg/ml? In range of 0.5～5.0ug/ml,the recovery is 96～102%?relatively standard deviation is less than 5.0%.