ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Coulometric determination of chromium, molybdenum, and tungsten by generated lead(II)

D. Kalavská

Department of Analytical Chemistry, Faculty of Natural Sciences, Komenský University, CS-842 15 Bratislava

Abstract:  The conditions of electrochemical generation of Pb(II) in the media of KNO₃, NH₄NO₃ or NH₄CIO₄ and in the media with pH adjusted within the range 7.7—8.1 were studied for the use of precipitation reactions of Pb(II) with Cr0₄^2-, MoO₄^2-, and WO₄^2- in the volumetric analysis. The developed procedures of determination were tested with respect to standard solutions of K₂CrO₄, Na₂MoO₄, and Na₂WO₄. The results of coulometric determination of Mo and W in ferromolybdenum and ferrotungsten obtained under proposed conditions were confronted with the results obtained by other methods or by the use of standard ferroalloys.

Full paper in Portable Document Format: 371a53.pdf

Chemical Papers 37 (1) 53–59 (1983)