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

邱豪 ¹李梁婷 ¹周会东 ¹苏思强 ¹邵蓓 ¹王祝¹

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作者信息

1. 西藏自治区地质矿产勘查开发局中心实验室
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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Cu2+会对硒的结果产生干扰,即:当水中Cu2+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.

Abstract

In this paper,it is found that when the concentration of Cu2+in water is less than 500μg/L,it will in-terfere 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

Key words

water samples/selenium/determination/atomic fluorometry spectrometry/potassium ferricyanide/ferric chloride/copper ion/interference

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出版年

2024

计量与测试技术

成都市计量监督检定测试所

计量与测试技术

影响因子：0.175

ISSN：1004-6941

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