Separation of vanadium(IV) from vanadium(V) and its determination in the presence of thiocyanate ions using two-phase aqueous systems

被引：1
作者：
Simonova, T. N. [1 ]
Dubrovina, V. A. [1 ]
机构：
[1] Donetsk Natl Univ, Dept Chem, UA-83001 Donetsk, Ukraine
来源：
JOURNAL OF ANALYTICAL CHEMISTRY | 2014年 / 69卷 / 09期
关键词：
vanadium(IV); vanadium(V); thiocyanate complex; chromazurol S; two-phase aqueous systems; spectrophotometry; atomic absorption spectrometry; SPECTROPHOTOMETRIC DETERMINATION; SPECIATION ANALYSIS; EXTRACTION; SAMPLES;
D O I：
10.1134/S1061934814070132
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A two-phase system of polyethylene glycol PEG-1500 (C2H5OH, C3H7OH)-ammonium sulfate-water is proposed for the selective extraction and spectrometric determination of vanadium(IV) as its thiocyanate complex. The conditions of the separation of vanadium(IV) from vanadium(V) are optimized using polyethylene glycol or water soluble alcohols. The detection limit for vanadium(IV) in extractionatomic absorption determination is 2.8 mu g/L and in combined photometric determination with chromazurol S, 10 mu g/L. The methods are tested on mine, waste, and river waters. The relative standard deviation does not exceed 7%. The duration of analysis is 20 min.
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页码：845 / 850
页数：6
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