【摘要】 叙述了一个测定金属Na中2ppm以上Ca的方法。基体Na通过真空蒸馏在360℃和5×10^-3Pa真空度下分离除掉,残渣中的Ca用原子吸收法测定。向1～4g高纯Na中加入2～500ppm Ca均获得了满意的回收率,其偏差系数为5.3～7.2％。我们对Ca及其化合物的蒸馏损失以及原子吸收法测定Ca时的干扰及抑制办法也做了详细研究。该方法适用于分析核级Na和工业Na中微量Ca。更多还原

【Abstract】 A method for determing calcium in sodium at 2 ppm or more is described. The matrix sodium was removed by vacuum distillation at 360"C and 5X 10~3Pa. The calcium in the residue was determined by atomic absorption spectrophotometry. The recovery rate of this method was satisfied in experiments of adding 2~500 ppm calcium to 1~ 4 grams of high purity sodium. The relative standard deviation was at 5. 3%~7. 2%. The possible loss of calcium and its compound resulting from distillation had been investigated. The interference and suppressing methods were also studied. ?更多还原