以三氯化铁为掩蔽剂原子荧光法测定水中硒的含量  

Determination of Selenium in Water by Atomic Fluorescence Spectrometry with Ferric Chloride as Masking Agent

作　　者：邱豪 李梁婷 周会东 苏思强 邵蓓 王祝 QIU Hao;LI Liangting;ZHOU Huidong;SU Siqiang;SHAO Bei;WANG Zhu

机构地区：[1]西藏自治区地质矿产勘查开发局中心实验室

出　　处：《计量与测试技术》2024年第8期36-39,共4页Metrology & Measurement Technique

基　　金：西藏自治区自然科学基金项目(项目名称:铁氰化钾在氢化物原子荧光法测水中硒时的优化分析,项目编号:XZ202201ZR0067G)。

摘　　要：本文通过条件试验发现,采用原子荧光法测定水中硒时,一定浓度以上的Cu^(2+)会对硒的结果产生干扰,即:当水中Cu^(2+)含量小于500μg/L时,对测定结果影响较小;大于500μg/L时,测定结果会严重偏低。因此,可加入铁氰化钾或三氯化铁溶液掩蔽。同时,由于铁氰化钾溶液见光或受热时可能会发生分解反应,产生有毒物质,因此,建议采用三氯化铁作为掩蔽剂。In this paper,it is found that when the concentration of Cu^(2+)in water is lessthan 50Oμg/L,it will interfere with the result of selenium determination by atomic fluorescence method.When the measurement is greater than 500μg/L,the result will be seriously low.Therefore,potassium ferricyanide or ferric chloride solution can be added for masking.At the same time,because potassium ferricyanide solution may decompose when it is exposed to light or heat,resulting in toxic substances,it is recommended to use ferric chloride as a masking agent.

关 键 词：水样 硒 测定 原子荧光法 铁氰化钾 三氯化铁 铜离子 干扰 

分 类 号：O657.31[理学—分析化学] X832[理学—化学]