摘要
本文提出了水样中硒（Ⅳ）、硒（Ⅵ）和有机硒的荧光测定方法。基于酸性介质中２，３－二氨基萘与硒（Ⅳ）的选择性反应，直接测定硒（Ⅳ）；利用盐酸还原硒（Ⅵ）和ＨＮＯ３－ＨＣｌＯ４消化有机硒后，用差减法分别测出硒（Ⅵ）和有机硒。检出限０．０７μｇ／Ｌ，线性范围０～１０μｇ／Ｌ。硒（Ⅳ）、硒（Ⅵ）和有机硒的相对标准偏差与回收率分别为２．４％和９８．５％～１０１．５％、３．１％和９４．８％～１０３％、４．０％和９４．５％～９８．８％。
A fluorimetic method for the determination of Se(),Se() and organic Se in water samples has been proposed. This method is based on the selective reaction of 2,3diaminonaphthalene with Se() in acid medium, and the Se() can be directly determined. The Se() and organic Se are determined by difference after reduction of the Se() with HCl and digestion of the organic Se with HNO3HClO4,respectively. The detection limit is 0.07g/L and the linear range of determination is 0￣10g/L. The relative standard deviations and recoveries of Se(), Se() and organic Se are 2.4% and 98.5%￣101.5%, 3.1% and 94.8%103%, 4.0% and 94.5%98.8%, respectively.
出处
《分析科学学报》
CAS
CSCD
1999年第2期154-157,共4页
Journal of Analytical Science
基金
国家自然科学基金
关键词
形态分析
硒
有机硒
荧光法
水样
测定
Selenium (), Selenium(), Organic selenium, Fluorometry, 2,3diaminonaphthalene
