低压离子色谱法测定稀土硫酸介质中氟的含量

Determination of fluorine in sulfuric acid containing rare earthions by low pressure ion chromatography

用低压离子色谱 (LPIC)法测定了稀土硫酸介质中氟的含量。针对稀土硫酸溶液测氟样品的复杂基体 ,提出了用KOH沉淀 掩蔽剂 (HY C6H8O7·H2 O)的样品预处理方法 ,消除了诸多阴、阳离子的干扰 ;选择适宜的LPIC分析条件 ,消除了SO2 -4 等阴离子干扰。对稀土硫酸浸取液中的氟作了测定和加标回收实验 ,氟的回收达 95

Low pressure ion chromatography was used to analysis of fluorine in sulfuric acid containing rare earth ions.KOH and Hy C 6H 8O 7·H 2O were used to mask other metalic ions and anions. The optimum condition was 1.4 mmol/L of Na 2CO 3 in eluent at a flow rate of 2 mL/min. The average recoveries of fluorine in several samples were over 95%.