酸浸-氯化银比浊法测定氟化稀土中氯离子含量  

Determination of Cl^(-) in rare earth fluoride by acid leaching and silver chloride turbidimetry

作　　者：张丽伟 权龙海 徐艳艳 高立红[1,2] ZHANG Liwei;QUAN Longhai;XU Yanyan;GAO Lihong(Baotou Research Institute of Rare Earths,Baotou 014030,Nei Mongol,China;Ruike National Engineering Research Center for Rare Earth Metallurgy and Functional Materials,Baotou 014030,Nei Mongol,China)

机构地区：[1]包头稀土研究院,内蒙古包头014030 [2]稀土冶金及功能材料国家工程研究中心,内蒙古包头014030

出　　处：《金属功能材料》2024年第4期49-53,共5页Metallic Functional Materials

摘　　要：试样以硝酸和过氧化氢浸取,在稀硝酸介质中,氯离子与银离子形成氯化银胶粒,在稳定剂丙三醇的存在下,采用紫外-可见分光光度计进行比浊,根据标准工作曲线确定氯离子含量。确定了最佳的酸浸条件、最佳的比浊条件,并进行了结果比对试验。检出限为0.0012%(质量分数),检测下限为0.0040%(质量分数)。试样氟化镝、氟化镨钕测定结果的相对标准偏差分别为1.78%、3.25%,该方法的精密度好、稳定性高。The sample was immersed in nitric acid and hydrogen peroxide.Chloride ions and silver ions formed silver chloride colloidal particles in a dilute nitric acid medium.Ultraviolet-visible spectroscopy was used for turbidimetry measurement In the presence of stabilizer glycerol.And the chloride ion content was determined based on the working curve.The optimal acid leaching conditions and turbidity conditions were determined in the study,base on result comparison experiments.The detection limit of the method was 0.0012%,and the detection lower limit was 0.0040%.The relative standard deviation of the experimental result was 3.25% and 1.78%,The method owned good precision and high stability.

关 键 词：氟化稀土 氯离子 比浊 紫外-可见分光光度法 

分 类 号：O657.3[理学—分析化学] TQ133.3[理学—化学]