论文部分内容阅读
本文提出了应用Ag-110做为指示剂的钡的放射性滴定。钡首先从pH为6的缓冲溶液中用铬酸钾定量沉淀。溶液中过剩的铬酸钾被标准AgNO_3溶液滴定。終点从测定每次加入AgNO_3后澄清液的放射性来确定。钙的干扰利用乙醇消除,锶利用控制pH值范围的方法消除。测定准确度均在±5％以内。
This paper presents the use of Ag-110 as an indicator of barium radioactive titration. Barium is first quantitatively precipitated with potassium chromate from a pH 6 buffer solution. Excess solution of potassium chromate was titrated with standard AgNO 3 solution. The endpoint was determined by measuring the radioactivity of the clarified solution after each addition of AgNO 3. The use of calcium to eliminate interference with ethanol, strontium use to control the pH range of the elimination method. Measurement accuracy are within ± 5%.