2001
DOI: 10.2116/analsci.17.1431
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Determination of Phosphorus Based on the Formation of a Reduced Keggin-Type 12-Molybdophosphate Complex in an Aqueous-Organic Solution

Abstract: Extensive studies have been devoted to the determination of phosphorus as phosphate ion by the molybdenum blue method. There have been many reports on various modifications of this method in order to make the sensitivity and stability high. Various reductants, such as 1-amino-2-naphthol-4-sulfonic acid, stannous chloride(II), and ascorbic acid have been used to reduce the molybdophosphate complex. 1-11 However, it is known to be difficult for methods using 1-amino-2-naphthol-4-sulfonic acid and stannous chlori… Show more

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Cited by 14 publications
(7 citation statements)
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“…The chemical and physical properties of polyoxometalates (POMs) have been studied extensively . POMs exhibit a wide range of structures, and many have been used in catalysis, analytical chemistry, biochemistry, and materials chemistry. POMs also exhibit extensive and often complicated redox behavior. The ability to exhibit multielectron and proton-transfer reactions facilitates their applications as oxidation catalysts in organic synthesis and water splitting. ,,, In general, Keggin and Wells–Dawson-type POMs, such as [XM 12 O 40 ] n − and [X 2 M 18 O 62 ] n − , respectively, exhibit a series of well-resolved one-electron transfer reactions in neutral or slightly acidic aqueous media that merge into two or more electron transfer reactions in strongly acidic aqueous solutions .…”
Section: Introductionmentioning
confidence: 99%
“…The chemical and physical properties of polyoxometalates (POMs) have been studied extensively . POMs exhibit a wide range of structures, and many have been used in catalysis, analytical chemistry, biochemistry, and materials chemistry. POMs also exhibit extensive and often complicated redox behavior. The ability to exhibit multielectron and proton-transfer reactions facilitates their applications as oxidation catalysts in organic synthesis and water splitting. ,,, In general, Keggin and Wells–Dawson-type POMs, such as [XM 12 O 40 ] n − and [X 2 M 18 O 62 ] n − , respectively, exhibit a series of well-resolved one-electron transfer reactions in neutral or slightly acidic aqueous media that merge into two or more electron transfer reactions in strongly acidic aqueous solutions .…”
Section: Introductionmentioning
confidence: 99%
“…The proposed method is working on simple and straight forward principles of the reduction of phosphomolybdate 11,17,23,24 by sodium sulphide leading to molybdenum blue which was monitored at, λ max 715 nm The developed method found to be having the following advantages over the reported methods. [14][15][16][17]23,25,27,32 . (i) It is more sensitive when compared to the reported method 17 .…”
Section: Discussionmentioning
confidence: 99%
“…(ii) The preparation of reducing agent in this method is very simple when compared to that in the official method 25 . (iii) It neither involves extraction 19 nor sophisticated instruments like HPLC, 16 flow injection spectrophotometer 15 and atomic spectroscopy 14 , nor requires strict control of pH 23,27,32 or temperature or heat treatment 32 .…”
Section: Discussionmentioning
confidence: 99%
“…4 Recently improved methods for the determination of phosphate have been developed that use water-miscible organic solvents, such as acetonitrile and ethylene glycol. 5,6 The structures of many polyoxometalates are based on a Keggin-or Dawson-type structure. The Keggin-type polyoxometalates, XM12O40…”
Section: Introductionmentioning
confidence: 99%