Reduction in the presence of ethylenediamine-tetraacetic acid (EDTA) and titrimetric determination of molybdenum

Application of ethylenediaminetetraacetic acid to the determination of metal.I

Abstract

The optimum pH giving the quantitative reduction of molybdenum with zinc amalgam in the presence of EDTA and tartrate was sought, and it was found that molybdenum could be reduced quantitatively to the tervalent state at pH 4.0 and 5.0 by shaking with the reagent for 2 min. After an addition of sodium hydroxide solution to the reduced solution, molybdenum was determined by titration with a standard potassium ferricyanide solution using indigocarmine as an indicator.