Determination of tungsten in low-grade tungsten ores by dual-column ion chromatography

A simple and rapid method was developed for the determination of tungsten in low-grade tungsten ores by dual-column ion chromatography using a conductivity detector. The chromatographic parameters based on ion selectivity, retention time and signal response were optimized for tungstate ion. Chloride...

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Published in:Analytica chimica acta 1994-03, Vol.287 (3), p.229-234
Main Authors: Wagh, D.N., Kumar, Sangita D., Iyer, C.S.P.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
Ion chromatography
Ores
Other chromatographic methods
Tungsten
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description A simple and rapid method was developed for the determination of tungsten in low-grade tungsten ores by dual-column ion chromatography using a conductivity detector. The chromatographic parameters based on ion selectivity, retention time and signal response were optimized for tungstate ion. Chloride, fluoride, sulphate, nitrate, chromate, molybdate and vanadate anions did not interfere in the determination. The reliability of the methods was tested by analysing two CANMET (Canadian reference) standards. The detection limit for tungstate was 1.35 mg 1 −1. The relative standard deviation ( n = 10) for the sample was 4.3% WO 3. The method was validated by analysing the ore samples by spectrophotometry using thiocyanate, neutron activation analysis and energy-dispersive x-ray fluorescence spectrometry.
doi_str_mv 10.1016/0003-2670(93)E0599-3
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subjects Analytical chemistry
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
Ion chromatography
Ores
Other chromatographic methods
Tungsten
title Determination of tungsten in low-grade tungsten ores by dual-column ion chromatography
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