탕그스텐의 용량분석법에 관하여 -Pb 아말감법

Volumetric Determination of Tungsten Lead Amalgam Method

  • Q. Won Choi (College of Liberal Arts and Sciences, Seoul National University) ;
  • Kyung Rok Min (Sang-dong Mine, Korea Tungsten Mining Co.)
  • 발행 : 19630600

초록

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 $PbCl_2$ crystals at the nozzle of Jones reductor. Furthermore, it has been confirmed that almost 100 mg. of $WO_3$ can be handled easily if the chloride concentration of the HCl is increased by adding solid $NH_4Cl$.

키워드

참고문헌

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