Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Poultry Sciencearrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
Poultry Science
Article . 1980 . Peer-reviewed
License: CC BY NC ND
Data sources: Crossref
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
Poultry Science
Article
License: CC BY NC ND
Data sources: UnpayWall
versions View all 1 versions
addClaim

An Evaluation of the AOAC Method of Yolk Color Analysis

Authors: D.L. FLETCHER;

An Evaluation of the AOAC Method of Yolk Color Analysis

Abstract

Abstract Experiments were conducted to evaluate and compare several methods of egg yolk color analysis. Egg yolks of various colors and intensities were produced either by feeding known concentrations of synthetic xanthophylls to color depleted hens or by mixing the xanthophylls directly into depleted egg yolks. The yolk samples were then analyzed for color using the AOAC procedure, visual comparisons using the Roche Color Fan, and by reflectance colorimetry to describe color in the CIE and L*a*b* systems. The AOAC procedure of beta-carotene equivalents was found to be inadequate in describing yolk colors produced from different xanthophyll sources. Yolks blended to approximate the same total xanthophyll concentration from natural feed sources or from canthaxanthin resulted in about the same beta-carotene equivalent values of 14.3 and 14.2 μg/g, respectively. Visual scoring resulted in a Roche Color Fan value of 7 for the natural yolks and 15 for the canthaxanthin blended yolk. The colorimetric analysis indicated that the natural yolk was more yellow and less red (578.4 dominant wavelength, 2.74 a* and 56.7 b*) than the canthaxanthin yolk (591.9 dominant wavelength, 25.60 a* and 34.7 b*). The AOAC procedure, however, shows good agreement with increases in a monopigment source of color. These results would indicate that the AOAC procedure is an adequate procedure for describing egg yolk color from a monopigment source. However, it is a very poor procedure for describing egg yolk color from a variety of pigments.

Related Organizations
  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    17
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
17
Top 10%
Top 10%
Average
gold