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

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/mc87ps73w

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • 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 Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
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
Additional Information
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-01-23T20:14:50Z (GMT) No. of bitstreams: 1 WONGGEOFFREY1987.pdf: 916867 bytes, checksum: ed69aeeb46204c3a001d1fbb7ec60f62 (MD5)
  • description.provenance : Submitted by Erin Clark (ecscannerosu@gmail.com) on 2012-01-23T20:05:19Z No. of bitstreams: 1 WONGGEOFFREY1987.pdf: 916867 bytes, checksum: ed69aeeb46204c3a001d1fbb7ec60f62 (MD5)
  • description.provenance : Made available in DSpace on 2012-01-26T16:33:21Z (GMT). No. of bitstreams: 1 WONGGEOFFREY1987.pdf: 916867 bytes, checksum: ed69aeeb46204c3a001d1fbb7ec60f62 (MD5) Previous issue date: 1987-11-09
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-01-26T16:33:21Z (GMT) No. of bitstreams: 1 WONGGEOFFREY1987.pdf: 916867 bytes, checksum: ed69aeeb46204c3a001d1fbb7ec60f62 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items