Properties and analytical applications of the heteropolymolybdates of phosphorus, arsenic, silicon and germanium-I Spectrophotometric examination of the heteropoly acids.


Spectrophotometric studies have been made of the heteropoly acids of phosphorus, arsenic, silicon and germanium, formed at molybdate concentrations of 10(-1)-10(-3)M. It was found that the heteropoly anion is quantitatively produced at a Z-value of 1.60 in the case of a quinquevalent central atom and 1.50 for a quadrivalent central atom, if the amount of… (More)