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
张丽伟 1权龙海 1徐艳艳 1高立红1
作者信息
- 1. 包头稀土研究院,内蒙古包头 014030;稀土冶金及功能材料国家工程研究中心,内蒙古包头 014030
- 折叠
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0.001 2％(质量分数),检测下限为0.004 0％(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.
Abstract
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 work-ing 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Key words
rare earth fluoride/chloridion/turbidimetry/ultraviolet-visible spectroscopy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据