Sorption-photometric determination of ascorbic acid using molybdosilicic heteropolyacid and polyurethane foam after microwave irradiation

Autor:	N. M. Kuz'min, A.V. Zhigulev, R. E. Nosov, Yu. A. Zolotov, Stanislava G. Dmitrienko, L.V. Goncharova
Rok vydání:	1998
Předmět:	Chromatography Diffuse reflectance infrared fourier transform Chemistry Microwave oven Sorption Ascorbic acid Biochemistry Dosage form Analytical Chemistry chemistry.chemical_compound Investigation methods Microwave irradiation Environmental Chemistry Spectroscopy Polyurethane
Zdroj:	Analytica Chimica Acta. 373:131-138
ISSN:	0003-2670
DOI:	10.1016/s0003-2670(98)00394-8
Popis:	An analytical procedure for the determination of ascorbic acid based on the reduction of molybdosilicic heteropolyacid immobilized on polyurethane foam by ascorbic acid in a microwave oven is developed. A blue-colored product of reduction of molybdosilicic heteropolyacid was determined immediately in the polyurethane foam using diffuse reflectance spectroscopy. The method was used to determine ascorbic acid in the range 0.6–40 mg/ml in the final measured solution. The application of microwave irradiation allows to shorten the analysis time from 20 h to 6.5 min. The substances, which usually accompany ascorbic acid, are tolerable. The proposed method can be applied for the determination of ascorbic acid in fruit juices and pharmaceutical preparations with satisfactory results. The reliability of the method was established by replicate determinations against the official Russian pharmacopoeial method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ca435177d1dd51feceaed5210984894f https://doi.org/10.1016/s0003-2670(98)00394-8 Zobrazit plný text záznamu Full Text from ScienceDirect