A sensitive kinetic method for determining low levels of hydrazine has
been described. The method is based on the measurement of the rate of
the reaction between hydrazine and Mo(VI) in the presence of hydrochl
oric acid. The redox reaction was monitored spectrophotometrically at
710 nm. The variable-time and fixed-time methods were used. The calibr
ation graph was linear for hydrazine concentrations of 1.0 X 10(-4)-1.
4 X 10(-2) M, using the fixed-time method of analysis. The method is s
imple, rapid, precise, sensitive and widely applicable.