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Ascorbic Acid Determination in Commercial Fruit Juice Samples by Cyclic Voltammetry
Joint Authors
Danet, Andrei Florin
Kalinowski, Slawomir
Pisoschi, Aurelia Magdalena
Source
Journal of Analytical Methods in Chemistry
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-02-15
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
A method was developed for assessing ascorbic acid concentration in commercial fruit juice by cyclic voltammetry.
The anodic oxidation peak for ascorbic acid occurs at about 490 mV on a Pt disc working electrode (versus SCE).
The influence of the potential sweep speed on the peak height was studied.
The obtained calibration graph shows a linear dependence between peak height and ascorbic acid concentration in the domain (0.1–10 mmol⋅L−1).
The equation of the calibration graph was y=6.391x+0.1903 (where y represents the value of intensity measured for the anodic peak height, expressed as μA and x the analyte concentration, as mmol⋅L−1, r2=0.9995, r.s.d.=1.14%, n=10, Cascorbic acid=2 mmol⋅L−1).
The developed method was applied to ascorbic acid assessment in fruit juice.
The ascorbic acid content determined ranged from 0.83 to 1.67 mmol⋅L−1 for orange juice, from 0.58 to 1.93 mmol⋅L−1 for lemon juice, and from 0.46 to 1.84 mmol⋅L−1 for grapefruit juice.
Different ascorbic acid concentrations (from standard solutions) were added to the analysed samples, the degree of recovery being comprised between 94.35% and 104%.
Ascorbic acid determination results obtained by cyclic voltammetry were compared with those obtained by the volumetric method with dichlorophenol indophenol.
The results obtained by the two methods were in good agreement.
American Psychological Association (APA)
Pisoschi, Aurelia Magdalena& Danet, Andrei Florin& Kalinowski, Slawomir. 2009. Ascorbic Acid Determination in Commercial Fruit Juice Samples by Cyclic Voltammetry. Journal of Analytical Methods in Chemistry،Vol. 2008, no. 2008, pp.1-8.
https://search.emarefa.net/detail/BIM-987973
Modern Language Association (MLA)
Pisoschi, Aurelia Magdalena…[et al.]. Ascorbic Acid Determination in Commercial Fruit Juice Samples by Cyclic Voltammetry. Journal of Analytical Methods in Chemistry No. 2008 (2008), pp.1-8.
https://search.emarefa.net/detail/BIM-987973
American Medical Association (AMA)
Pisoschi, Aurelia Magdalena& Danet, Andrei Florin& Kalinowski, Slawomir. Ascorbic Acid Determination in Commercial Fruit Juice Samples by Cyclic Voltammetry. Journal of Analytical Methods in Chemistry. 2009. Vol. 2008, no. 2008, pp.1-8.
https://search.emarefa.net/detail/BIM-987973
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-987973