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Issue 4 (2) 2005 pp. 5 - 16

Jolanta Wawrzyniak, Antoni Ryniecki, Włodzimierz Zembrzuski

APPLICATION OF VOLTAMMETRY TO DETERMINE VITAMIN C IN APPLE JUICES

Abstract The cyclic voltammetric method, which is based on the redox properties of ascorbic acid, was adopted to determine the concentration of vitamin C in apple juices. Recorded on voltammograms, the oxidation current of ascorbic acid was linearly dependent on the ascorbic acid concentration (a linear calibration curve was found in the range of up to 150 mg ascorbic acid/100 cm3 solution). The standard addition technique was used to determine the ascorbic acid concentration. To verify results, the titrimetric method was used. Differences between concentrations of vitamin C determined using the cyclic volt-ammetric and titrimetric methods are lower than 1 mg (in comparison to concentrations of ascorbic acid about 50 mg/100 cm3 of juice). The method – easy for automation – can be used directly without special preparation of studied apple juices samples before measure-ment of the vitamin C concentration.
Keywords: ascorbic acid, cyclic voltammetry, apple juice, vitamin C, platinum electrode
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http://www.food.actapol.net/issue2/volume/1_2_2005.pdf

For citation:

MLA Wawrzyniak, Jolanta, et al. "APPLICATION OF VOLTAMMETRY TO DETERMINE VITAMIN C IN APPLE JUICES." Acta Sci.Pol. Technol. Aliment. 4.2 (2005): 5 - 16.
APA Wawrzyniak J.,Ryniecki A.,Zembrzuski W. (2005). APPLICATION OF VOLTAMMETRY TO DETERMINE VITAMIN C IN APPLE JUICES. Acta Sci.Pol. Technol. Aliment. 4 (2), 5 - 16
ISO 690 WAWRZYNIAK, Jolanta, RYNIECKI, Antoni, ZEMBRZUSKI, Włodzimierz. APPLICATION OF VOLTAMMETRY TO DETERMINE VITAMIN C IN APPLE JUICES. Acta Sci.Pol. Technol. Aliment., 2005, 4.2: 5 - 16.