Title of article
Acidity in methanol-water
Author/Authors
Rived، Fernando نويسنده , , Canals، Immaculada نويسنده , , Bosch، Elisabeth نويسنده , , Rosés، Mart? نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2001
Pages
-314
From page
315
To page
0
Abstract
The voltammetric behavior of Vitamin C (L-ascorbic acid) at carbon paste electrodes and electrodes modified with aza macrocycles have been studied. The use of zinc complexes, formed in situ at the electrode surface reduced the overpotential for the oxidation of ascorbic acid by about 200mV and enhanced the peak currents. Linearity was observed over the range of 0.6-500µg/cm3 with a detection limit of 0.1µg/cm3 by differential pulse voltammetry. The modified electrode was used for the determination of Vitamin C in multivitaminmultimineral pharmaceutical preparations, fruit juices and wine samples.
Keywords
Acidity , Methanol-water , Preferential solvation , pK
Journal title
Analytica Chimica Acta
Serial Year
2001
Journal title
Analytica Chimica Acta
Record number
49455
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