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Extraction and rapid x-ray fluorescence spectrometric determination of tungsten in ore-dressing products of scheelite

✍ Scribed by J. Muralidhar; Usharani Patnaik; S. Misra; Rajeev

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 196 KB
Volume: 27
Category: Article
ISSN: 0049-8246
DOI: 10.1002/(sici)1097-4539(199803/04)27:2<117::aid-xrs262>3.0.co;2-5

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✦ Synopsis

Leaching of tungsten in the ore-dressing products of scheelite by various carboxylic acids revealed that oxalic acid leaches tungsten quantitatively. Powdered scheelite samples of Ô200 mesh size were decomposed with 4% oxalic acid at 100 ÄC with constant stirring for 1 h. Tungsten was determined by x-ray Ñuorescence spectrometry using liquid cups. The results obtained were in close agreement with those obtained by a spectrophotometric method. The procedure is applicable to the analysis of ore-dressing products containing 5-70% with a relative standard WO 3 deviation of 0.3% .

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