溶剂萃取分离—诱导法测定纤克量的硒和碲

• 作 者: 范蔚全 周渊
• 机 构: 云南省地质局实验室,
• 出 处: 理化检验.化学分册
• 发表日期: 1983年03期
• 关键词: 测定下限 铜试剂 选择性指数 方法选择性 溶剂萃取 连测 诱导法 萃取分离 时可 摇匀

本文提出以铜(Ⅱ)为共萃剂用铜试剂—四氯化碳萃取硒(先控制pH9萃取碲),实现硒、碲与其它元素和它们相互分离。应用直接诱导法分别连测硒和碲。测定下限达0.05纤克/毫升,在取样为1毫克时可测0.000x%的硒和碲。拟定了微量被测对象的分析手续。本文还提出了描述方法选择性的选择性指数(pS)的新概念。

In this paper, selenium (first controlled pH9 extraction of tellurium) was extracted with copper (Ⅱ) as a co-solvent with copper reagent-carbon tetrachloride to separate selenium and tellurium from other elements and separate them. The direct induction method was used to measure selenium and tellurium separately. The lower limit of determination was 0.05 ng / ml, with selenium and tellurium being 0.000x% measurable at a sample of 1 mg. Draw up a trace of the test object analysis procedures. The paper also presents a new concept describing the selectivity of the method (pS).