Direct spectrophotometric determination of phosphonate and diphosphate ions based on the formation of heteropoly blue complexes

被引：7

作者：

Himeno, S ^{[1
]}

Ueda, T ^{[1
]}

Niiya, H ^{[1
]}

Iwai, I ^{[1
]}

Hori, T ^{[1
]}

机构：

[1] KYOTO UNIV,GRAD SCH HUMAN & ENVIRONM STUDIES,KYOTO 60601,JAPAN

来源：

ANALYTICAL SCIENCES | 1997年 / 13卷 / 03期

关键词：

heteropoly blue complex; phosphonate ion; diphosphate ion; absorption spectroscopy;

D O I：

10.2116/analsci.13.369

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple spectrophotometric method is proposed for the direct determination 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 mixed-valence blue species thus formed depended linearly on the PHO32- and P2O74- concentrations in the ranges 1x10(-5) -1x10(-3) M and 2x10(-5) -2x10(-4) M, respectively. Interferences from foreign ions are also discussed.

引用

页码：369 / 372

页数：4

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