A METHOD FOR THE DETERMINATION OF ASCORBIC-ACID USING THE IRON(II)-PYRIDINE-DIMETHYLGLYOXIME COMPLEX

Authors
ARYA SP MAHAJAN M
Citation
Sp. Arya et M. Mahajan, A METHOD FOR THE DETERMINATION OF ASCORBIC-ACID USING THE IRON(II)-PYRIDINE-DIMETHYLGLYOXIME COMPLEX, Annali di chimica, 88(5-6), 1998, pp. 429-436
Citations number
26
Categorie Soggetti
Chemistry Analytical","Environmental Sciences
Journal title
Annali di chimica → ACNP
ISSN journal
00034592
Volume
88
Issue
5-6
Year of publication
1998
Pages
429 - 436
Database
ISI
SICI code
0003-4592(1998)88:5-6<429:AMFTDO>2.0.ZU;2-Y
Abstract
A simple and rapid spectrophotometric method for the determination of ascorbic acid is proposed. Ascorbic acid reduces iron (III) to iron (I I) which forms a red colored complex with dimethylglyoxime in the pres ence of pyridine. The absorbance of the resulting solution is measured at 514 nm and a linear relationship between absorbance and concentrat ion of ascorbic acid is observed up to 14 mu g ml(-1). Studies on the interference of substances usually associated with ascorbic acid have been carried out and the applicability of the method has been tested b y analysing pharmaceutical preparations of vitamin C.