Spectrophotometric determination of gallium as GaMo_4W_8O~5-_40 reduced by hydrazine

摘要

The reduction of molybdotungsten heteropolyanion (HPA) GaMo_4W_8O~5-_40 by hydrazine has been studied. The formation of oxydized form is investigated and the region of pH of selective reduction of HPA is found. With using of this reaction simple method of determination 10~-5 - 10~-4 mol/l gallium was worked out.