Chromaticity characteristics of binary and ternary molybdenum(VI) complexes with o,o'-dihydroxyazo and heterocyclic azo compounds

The chromaticity characteristics of molybdenum(VI) complexes with o,o'-dihydroxyazo compounds (Lyumogallion IREA and Magnezon IREA) and heterocyclic azo compounds [4-(2-pyridylazo)resorcinol and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol] were studied in the presence and in the absence of the third component, hydroxylamine. It was demonstrated that chromaticity characteristics can be used for analyzing samples with low molybdenum concentrations. The calibration graph equations for the color characteristics of complexes both in solution and in the immobilized exhibit sensitivity coefficients more than an order of magnitude higher than For absorbance and the Kubelka-Munk function.