Graduate Thesis Or Dissertation

 

Characterization of anthocyanins in fruit juices and natural colorants Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nc580p61w

Descriptions

Attribute NameValues
Creator
Abstract
  • A method for separation and characterization of individual anthocyanins was developed. High Performance Liquid Chromatography (HPLC) with a polymer based reversed-phase column was used to separate the pigments while on-line Photodiode Array Detection (PDA) was employed to record the UV and Visible spectrum of the individual peaks. Spectral information obtained from on-line PDA detection provided information about: 1) the nature of the aglycone, 2) the sugar substitution pattern and 3) the presence or absence of hydroxy aromatic organic acids. The nature of the glycosidation can be determined from the HPLC retention characteristics. The HPLC/PDA methods were employed to characterize the anthocyanin profiles of the pigments in cranberry, roselle, cherry, bilberry, grape, red cabbage, black raspberry, blackberry, elderberry, plum, blackcurrant and strawberry. The anthocyanidin profiles were also determined for the samples for purposes of confirmation of the anthocyanin data. In addition to the anthocyanin and anthocyanidin profiles, the general coloring properties for most of the samples were also determined. Included were Hunter L, a, b values, total anthocyanin pigment concentration, wavelength maxima, percent tannin measurements, tinctoral strength, pH measurements and titratable acidity.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
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
Additional Information
  • description.provenance : Made available in DSpace on 2012-01-26T18:36:24Z (GMT). No. of bitstreams: 1 HONGVICTOR1987.pdf: 1368152 bytes, checksum: 6673951ef1519e6624c65f69ea2d8886 (MD5) Previous issue date: 1987-12-17
  • description.provenance : Submitted by Erin Clark (ecscannerosu@gmail.com) on 2012-01-03T23:04:56Z No. of bitstreams: 1 HONGVICTOR1987.pdf: 1368152 bytes, checksum: 6673951ef1519e6624c65f69ea2d8886 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-01-26T18:36:24Z (GMT) No. of bitstreams: 1 HONGVICTOR1987.pdf: 1368152 bytes, checksum: 6673951ef1519e6624c65f69ea2d8886 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-01-04T22:30:23Z (GMT) No. of bitstreams: 1 HONGVICTOR1987.pdf: 1368152 bytes, checksum: 6673951ef1519e6624c65f69ea2d8886 (MD5)

Relationships

Parents:

This work has no parents.

In Collection:

Items