离子选择电极法测定氟化镝中微量氯的研究  

Determination of Chloride in Dysprosium Fluoride with Ion Selective Electrode

作　　者：赖心[1] 徐立[1] 张永进[1] 

机构地区：[1]广州有色金属研究院,广州510651

出　　处：《化学传感器》2000年第4期32-35,共4页Chemical Sensors

摘　　要：氯离子选择电极多次标准添加作图法测定氟化镝中微量氯离子,试样用硼酸和硝酸溶解,或硼酸和无水碳酸钠熔解,大量镝和氯离子络合带来的干扰,可以由氟离子及柠檬酸根络合消除、方法简单快速,相对标准偏差小于8.0%(n=6),加料回收率为90%～106%,最低可测定氯离子含量约为0.001%。Chloride in dysprosium fluoride has been determined by using the standard addition method with a chloride selective electrode. The sample is directy dissolved in boric acid and nitric acid,or after melting with boric acid and sodium carbonate. The interference of dysprosium and chloride can be eliminated by fluoride and citrate complexing. The proposed procedure is simple and fast,with a relative standard deviation of less than 8% and standard addition recoveries of 90%-106%. This method can determine chloride as low as 0.001%.

关 键 词：离子选择电极 测定 氯离子 氟化镝 

分 类 号：O657.1[理学—分析化学]