Rapid, sensitive and selective spectrophotometric determination of phosphate as an ion associate of 12-molybdophosphate with Astra Phloxine

Vishnikin, Andriy B.; Al-Shwaiyat, Mohammed K.E.A.; Bazeľ, Yaroslav; Andruch, Vasiľ

doi:10.1007/s00604-007-0754-7

Cited by 13 publications

(5 citation statements)

References 29 publications

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“…To evaluate the efficiency of the method, tap and river water samples were subjected to the developed DLLME-SFO procedure as well as to a reference method [10,21] to determine the phosphate content. The obtained results are summarized in Table 2.…”

Section: Analytical Applicationmentioning

confidence: 99%

“…The color can be enhanced by the formation of a mixed vanadomolybdate phosphate complex, by reduction with various reducing agents, or by formation of ion association complexes with basic dyes [7,9,10]. The modified ascorbic acid method of Murphy and Riley [11] with the addition of antimonyl tartrate is said to offer many advantages over methods using other reducing agents, such as tin(II) chloride or only ascorbic acid, for example a rapid reaction at ambient temperature, a stable product and less sensitivity to interference.…”

Section: Introductionmentioning

confidence: 99%

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Application of solidification of floating organic drop microextraction for inorganic anions: Determination of phosphate in water samples

Zaruba

Vishnikin

Andruch

2015

Microchemical Journal

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Section: Analytical Applicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of solidification of floating organic drop microextraction for inorganic anions: Determination of phosphate in water samples

Zaruba

Vishnikin

Andruch

2015

Microchemical Journal

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“…Recently, we have found, that in contrast to other known heteropolyanions, Dawson 18-molybdo-2-phosphate heteropoly anion P 2 Mo 18 O 62 6reacts almost instantly with ascorbic acid, epinephrine, p-aminophenol and some other species behaving as a reducer. [27][28][29][30][31] In this work, it was found that the rate of reduction of 18-MPC with paracetamol significantly increases in sufficiently alkaline solution. On this basis, new simple, fast and sensitive spectrophotometric method was developed for the determination of paracetamol, which was applied to its assay in pharmaceutical formulations.…”

mentioning

confidence: 66%

Spectrophotometric Determination of Paracetamol by Reduction of 18-Molybdo-2-Phosphate Heteropoly Anion

Al-Shwaiyat¹

2013

JJC

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A very simple, rapid and sensitive spectrophotometric method for paracetamol assay in pharmaceuticals based on the reduction of 18-molybdo-2-phosphate heteropoly complex was developed. Reaction of 18-molybdo-2-phosphate with paracetamol is very fast at room temperature. The stoichiometry of the reaction is 1:1. The molar absorptivity calculated for paracetamol was equal to that for heteropoly blue formed in the studied reaction and was of 1.15×10 4 l mol-1 cm-1 at 820 nm. Beer`s law was followed for paracetamol concentrations from 0.3 to 7.5 µg ml-1 (l = 1 cm). The detection limit of the method was 0.03 µg ml-1 (l = 5 cm), and a relative standard deviation did not exceed 2.5 %. The method was successfully applied to the determination of paracetamol in pharmaceuticals.

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“…Its protonation and hydrolysis con stants and the molar absorption coefficient are pK pr = 1.80 ± 0.04, pK h = 13.65 ± 0.11, ε = 14.1 × 10 4 (at λ max = 538 nm), respectively. Previously, we used this dye for the spectrophotometric determination of pal ladium [37], zinc [38], gold [41], phosphorus [45], tungsten [46], and manganese [47].…”

Section: Methodsmentioning

confidence: 99%

Extraction of platinum with Astrafloxin FF from aqueous-organic solutions: Separative extraction-spectrophotometric determination of platinum(II) and platinum(IV) species

et al. 2012

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The optimum conditions of the extraction of the ion associates of platinum with the thiocyanate ions and the polymethine basic dye Astrafloxin FF by aromatic hydrocarbons and acetic acid esters from aqueous and aqueous organic solutions were studied. The introduction of water soluble donor active sol vents (hexamethylphosphoric triamide, N,N diethylacetamide, N,N dimethylformamide, and N,N diethyl formamide) leads to a considerable increase in the extraction of the ion associates of platinum and the simul taneous suppression of the extraction of the simple dye salt. The molar absorption coefficients of the extracts of ion associates are as high as (8.1-13.3) × 10 4 . 84-96% platinum is extracted in the form of ion associates by a single extraction. The conversion of platinum into ion associates makes it possible to separate platinum from many elements, including Cu, Cd, Ni, Co, Cr, Pb, In, Ag, Pd, Ir, Rh, and Ru, by extraction. In this case, platinum(II) is extracted in the form of ion associates under standard conditions, whereas platinum(IV) is extracted only after the preliminary thermal treatment of the test sample. A new procedure was developed for the extraction-spectrophotometric determination of the trace amounts of platinum(II) and plati num(IV), in particular, in their mixtures.

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Rapid, sensitive and selective spectrophotometric determination of phosphate as an ion associate of 12-molybdophosphate with Astra Phloxine

Cited by 13 publications

References 29 publications

Application of solidification of floating organic drop microextraction for inorganic anions: Determination of phosphate in water samples

Application of solidification of floating organic drop microextraction for inorganic anions: Determination of phosphate in water samples

Spectrophotometric Determination of Paracetamol by Reduction of 18-Molybdo-2-Phosphate Heteropoly Anion

Extraction of platinum with Astrafloxin FF from aqueous-organic solutions: Separative extraction-spectrophotometric determination of platinum(II) and platinum(IV) species

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