论文部分内容阅读
本文叙述了以Sr~(89)作指示剂用硫酸钠标准溶液放射性滴定锶的方法。为了降低硫酸锶的溶解度,在50%乙醇水溶液中进行滴定。钙对锶的滴定没有干扰,在PH1—5时用沉淀BaCrO_4和PbCrO_4的办法消除了钡和铅的干扰,铝和铗分别在PH2—4.3和PH4—4.5时不干扰。用本法测定天青石中的锶时得到了满意的结果。
This paper describes the method of radioactive titration of strontium with sodium sulfate standard solution using Sr ~ (89) as an indicator. To reduce the solubility of strontium sulfate, titration was performed in 50% aqueous ethanol. Calcium did not interfere with the titration of strontium. At pH 1-5, the interference of barium and lead was eliminated by precipitation of BaCrO 4 and PbCrO 4, respectively. Aluminum and gallium did not interfere with pH 2-4.5 and pH 4-4.5, respectively. Satisfactory results have been obtained using this method for the determination of strontium in celestite.