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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 7, Number 2
JKCSEZ 7(2)
April 20, 1963 

 
Title
Volumetric Determination of Tungsten Lead Amalgam Method

탕그스텐의 용량분석법에 관하여-Pb 아말감법
Author
Q. Won Choi, Kyung Rok Min

최규원, 민경록
Keywords
Abstract
An attempt to improve the method of volumetric determination of tungsten developed by Luke has been made successfully. Using amalgam coated lead instead of pure metallic lead in the reduction procedure. W(Ⅵ)-W(Ⅲ) reduction has been found to be quantitative in rather concentrated hydrochloric acid. Since there was no excessive dissolution of lead via reduction of hydrogen ion, lead surface was totally accessible for the reduction of tungsten and no trouble was caused by dereposition of PbCl2 crystals at the nozzle of Jones reductor. Furthermore, it has been confirmed that almost 100 mg. of WO3 can be handled easily if the chloride concentration of the HCl is increased by adding solid NH4Cl.
Page
186 - 188
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