Graduate Thesis Or Dissertation
 

The stability of ascorbic acid in bottled cranberry-based beverages under home-use conditions

Pubblico Deposited

Contenuto scaricabile

Scarica il pdf
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/mc87ps73w

Descriptions

Attribute NameValues
Creator
Abstract
  • Commercially bottled, vitamin C-fortified, cranberry juice cocktail and cranberry-apple (cranapple) juice drinks were stored at 5°C under simulated home-use conditions. Ascorbic acid (AA) and dehydroascorbic acid (DHA) levels were evaluated over a period of seven days by high performance liquid chromatography (HPLC). Total vitamin C content was also determined by a classical spectrophotometric method. The HPLC data revealed a significant decrease of AA during the storage of both juice drinks resulting in losses of 35% and 27% in the cranberry and cranapple drinks, respectively. The loss of ascorbic acid was offset by the simultaneous increase of DHA (a biologically active vitamin) so that the sum of AA+DHA decreased 13% and 0% in the cranberry and cranapple drinks, respectively. Thus ascorbic acid retention was apparently influenced by the nature of the juice system. The spectrophotometric results indicated no significant loss of total vitamin C activity during the storage of either juice drinks. The observed differences between the spectrophotometric and HPLC results were attributed to interference problems associated with the spectrophotometric method.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Dichiarazione dei diritti
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using Scamax Scan+ V.1.0.32.10766 on a Scanmax 412CD by InoTec in PDF format. LuraDocument PDF Compressor V.5.8.71.50 used for pdf compression and textual OCR.
Replaces

Le relazioni

Parents:

This work has no parents.

In Collection:

Elementi

Thumbnail Titolo Data caricata Visibilità Azioni
file details WONGGEOFFREY1987.pdf 2017-08-03 Pubblico Scaricare