Coulometric determination of chromium, molybdenum, and tungsten by generated lead(II)
نویسندگان
چکیده
The conditions of electrochemical generation of Pb(II) in the media of KN03, 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 ", M0O4", and WO4" in the volumetric analysis. The developed procedures of determination were tested with respect to standard solutions of K2Cr04, Na2Mo04, and Na2W04. 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.
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تاریخ انتشار 2013