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Моросанова, Е. И.; Reznikova, E. A.; Velikorodnyi, A. A.

doi:10.1023/a:1009459021972

Cited by 19 publications

(12 citation statements)

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“…This problem is overcome by the use of reagents which have specific color reactions with AA. Most of these methods are based on the AA reducing ability and thus, use the metal colored complexes (Fe(III)-ferrozine [11], Fe(III)-1,10-phenantroline [12], Cu(II)-neocuproine [13]) or the heteropoly compounds (HPC) [14, 15, 17] as chromogenic reagents. The reducing ability of AA can also be employed in fluorescent determination, as AA reduces copper(II) to copper(I) which releases graphene quantum dots fluorescence [6].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of metal ions [Cu(II), Ti(IV), Bi(III)] in solution has been previously shown to accelerate the HPC reduction, both in solution and in solid phase. Silica xerogels doped with HPC and copper(II) have been used for AA determination in soft drinks [17]. The use of mixed silica-titania xerogels may offer new possibilities for the sensor material development.…”

Section: Introductionmentioning

confidence: 99%

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Silica-titania xerogel doped with Mo,P-heteropoly compounds for solid phase spectrophotometric determination of ascorbic acid in fruit juices, pharmaceuticals, and synthetic urine

Morosanova

Моросанова

2017

Chemistry Central Journal

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BackgroundAscorbic acid is one of the most important vitamins to monitor in dietary sources (juices and vitamins) and biological liquids.ResultsSilica and silica-titania xerogels doped with Mo,P-heteropoly compounds (HPC) have been synthesized varying titanium(IV) and HPC content in sol. Their surface area and porosity have been studied with nitrogen adsorption and scanning electron microscopy, their elemental composition has been studied with energy-dispersive X-ray analysis. The redox properties of the sensor material with sufficient porosity and maximal HPC content have been studied with potentiometry and solid phase spectrophotometry and it has been used for solid phase spectrophotometric determination of ascorbic acid. The proposed method is characterized by good selectivity, simple probe pretreatment and broad analytical range (2–200 mg/L, LOD 0.7 mg/L) and has been applied to the analysis of fruit juices, vitamin tablets, and synthetic urine.ConclusionsNew sensor material has been used for simple and selective solid phase spectrophotometric procedure of ascorbic acid determination in fruit juices, vitamin tablets, and synthetic urine.Graphical abstractWe synthesized several silica-titania xerogels doped with Mo,P-heteropoly compounds, studied their properties, and designed the sensor material for solid phase spectrophotometric determination of ascorbic acid in fruit juices, pharmaceuticals, and synthetic urine.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silica-titania xerogel doped with Mo,P-heteropoly compounds for solid phase spectrophotometric determination of ascorbic acid in fruit juices, pharmaceuticals, and synthetic urine

Morosanova

Моросанова

2017

Chemistry Central Journal

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“…It was proposed to include MPA into the composi tion of xerogels and use the resultant indicator pow ders for the determination of hydrazine in waters by solid phase spectrophotometry [60,61]. The limit of hydrazine quantification is 0.2 mg/L.…”

mentioning

confidence: 99%

“…It has been proposed to determine hydrazine using xerogels modified with MPA providing the determina tion in the concentration range 0.08-6 and 0.02-1 mg/L if the test systems are indicator powders and indicator tubes, respectively [61]. For the acceleration of the reaction between MPA and hydrazine it was proposed to introduce copper(II) ions into xerogels [60].…”

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confidence: 99%

Spectrophotometric and fluorometric methods for the determination of hydrazine and its methylated analogues

2012

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“…Procedures were developed for the solid-phasespectrophotometric and visual test determination of ascorbic acid [42] with the use of silicic acid xerogel modified with the Vavele reagent (mixture of series 12 and 18 phosphomolybdic acids) and copper(II) as an indicator powder.…”

Section: Determination Of Low-molecular Bioantioxidantsmentioning

confidence: 99%

Antioxidants As Analytes in Analytical Chemistry

Будников

Ziyatdinova

2005

J Anal Chem

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Procedures for the determination of individual antioxidants of different nature in biological materials with the use of electrochemical, chromatographic, spectrochemical, and other methods were considered. The main performance characteristics of these procedures are presented. JOURNAL OF ANALYTICAL CHEMISTRY Vol. 60 No. 7 2005 ANTIOXIDANTS AS ANALYTES IN ANALYTICAL CHEMISTRY 601rings, the ortho and para positions of hydroxyl groups, their tert -butyl screening, the formation of semiquinone forms, thiol-containing compounds, the chelation of variable-valence metals, receptor interactions with the cell membrane, etc.

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Cited by 19 publications

References 1 publication

Silica-titania xerogel doped with Mo,P-heteropoly compounds for solid phase spectrophotometric determination of ascorbic acid in fruit juices, pharmaceuticals, and synthetic urine

Silica-titania xerogel doped with Mo,P-heteropoly compounds for solid phase spectrophotometric determination of ascorbic acid in fruit juices, pharmaceuticals, and synthetic urine

Spectrophotometric and fluorometric methods for the determination of hydrazine and its methylated analogues

Antioxidants As Analytes in Analytical Chemistry

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