【摘要】 采用EDTA滴定法测定了稀土镁锆中间合金中的锆。实验确定了合金分解方法及锆滴定时的酸度及温度条件,分析了基体及杂质铁的干扰及消除。分析结果相对标准偏差小于2.5%,标加回收率为98.9%~101.8%。更多还原

【Abstract】 Zirconium in rare earth-magnesium-zirconium master alloy was determined by EDTA titrimetry. Series of experiments were performed to investigate the decomposing method, titration acidity and temperature. Interferences of matrix and impurities were analyzed and the removal steps were proposed. The relative standard deviation was less than 2.5 % and the recovery rate by standard addition method was in the range of 98.9%～101.8%.更多还原