Abstract
Conditions have been found for the preconcentration and reduction of molybdophosphoric acid from aqueous solutions on Amberlite XAD-7 and XAD-8 adsorbents in the batch and dynamic modes. A spectrophotometric method was developed for determining phosphate as molybdophosphoric acid after its extraction on Amberlite XAD-8 and desorption with acetonitrile. The concentration factor was 5.0 × 103. A sorption–spectroscopic method was also proposed for determining phosphate in solutions as molybdovanadophosphoric acid, one which includes its adsorption on polyurethane foam, reduction in the sorbent phase, and the measurement of diffuse reflectance.
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