DIRECT SPECTROPHOTOMETRIC DETERMINATION OF PHOSPHONATE AND DIPHOSPHATE IONS BASED ON THE FORMATION OF HETEROPOLY BLUE COMPLEXES

Authors
HIMENO S UEDA T NIIYA H IWAI I HORI T
Citation
S. Himeno et al., DIRECT SPECTROPHOTOMETRIC DETERMINATION OF PHOSPHONATE AND DIPHOSPHATE IONS BASED ON THE FORMATION OF HETEROPOLY BLUE COMPLEXES, Analytical sciences, 13(3), 1997, pp. 369-372
Citations number
19
Categorie Soggetti
Chemistry Analytical
Journal title
Analytical sciences → ACNP
ISSN journal
09106340
Volume
13
Issue
3
Year of publication
1997
Pages
369 - 372
Database
ISI
SICI code
0910-6340(1997)13:3<369:DSDOPA>2.0.ZU;2-3
Abstract
A simple spectrophotometric method is proposed for the direct determin ation of PHO32- and P2O74- ions. In acidic solutions containing 50%(v/ v) CH3COCH3, the Mo(VI)-Mo(V) reagent reacts directly with PHO32- and P2O74- ions to form the respective heteropoly blues. The amounts of mi xed-valence blue species thus formed depended linearly on the PHO32- a nd P2O74- concentrations in the ranges 1x10(-5) -1x10(-3) M and 2x10(- 5) -2x10(-4) M, respectively. Interferences from foreign ions are also discussed.