Kinetic determination of microquantities of D(−)-arabinose

A kinetic method for the determination of microquantities of d(?)-arabinose is presented. The method is based on the accelerating effect of d(?)-arabinose on the reaction between molybdenum(VI) and hydrogen peroxide in solution containing 50 vol% of acetonitrile. In order to find optimum experimental conditions for the determination of d(?)-arabinose, the kinetics of the reaction between molybdenum(VI) and hydrogen peroxide in the presence, as well as in the absence, of d(?)-arabinose was studied. d(?)-Arabinose was determined photometrically by following the rate of the colored reaction product formation. The concentrations of d(?)-arabinose which were determined ranged from 46 to 135 μg/ml, and the standard deviation was lower than 10%.