摘要
为确保碘离子溶液标准物质量值的准确,本文对原料碘化钾的纯度定值方法进行了研究,并进行了不确定度评定。采用沉淀滴定法测定了碘化钾的纯度,对可能存在的干扰离子进行分析,并采用离子色谱法对含量较高的杂质定量测定。最后确定碘化钾的纯度为99.7%,纯度的扩展不确定度为0.3%。
The purity determination method of raw material potassium iodide was studied to ensure the accuracy of certified reference material of iodine ion solution,and the uncertainty was evaluated. The purity of potassium iodide was analyzed by precipitation titration,the possible interferential ions were analyzed,and the impurities with high content were quantitatively determined by ion chromatography. It was revealed that the purity of potassium iodide was 99. 7 %,and the expanded uncertainty of purity was 0. 3%.
作者
公茂龙
郭波
孙倩芸
许爱华
李锋丽
周兴
Gong Maolong;Guo Bo;Sun Qianyun;Xu Aihua;Li Fengli;Zhou Xing(Shandong Institute of Metrology,Ji′n an 250014,China;Shandong Social Justice Measurement Center,Ji′n an 250014,China)
出处
《分析仪器》
CAS
2022年第4期48-51,共4页
Analytical Instrumentation
关键词
碘化钾
纯度
滴定
杂质扣除
不确定度
Potassium iodide
Purity
Titration
Impurity deduction
Uncertainty
