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

✍ Scribed by D.N. Wagh; Sangita D. Kumar; C.S.P. Iyer

• Book ID: 102623249
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 432 KB
• Volume: 287
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)e0599-3

✦ Synopsis

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 method was tested by analysing two CANMET (Canadian reference) standards. The detection limit for tungstate was 1.35 mg 1-t. The relative standard deviation (n = 10) for the sample was 4.3% at 0.71% WO,. The method was validitated by analysing the ore samples by spectrophotometry using thiocyanate, neutron activation analysis and energy-dispersive x-ray fluorescence spectrometry.