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Butter and butter-oil. Physical and chemical methods. Determination of the colour of butter-oil with the Lovibond tintometer

Anonymous

Netherlands Standard (NEN-3734): 2

1974

Accession: 000306495
This standard describes a method for determining colour by visual comparison with the standardized colour scale of the Lovibond tintometer, with cuvettes of 133 mm and red and yellow colour filters. The result is expressed as the average of 2 determinations, in units and tenths of units of the filters used. The difference between results of duplicate determinations should not exceed 8 yellow and 0.7 red units.

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Related References

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Richter, F. 1935: Photometric measurements on butter, butter colour and carotene. Standardisation of butter colour Milchwirtsch. Forsch 17: 72-86
Watson, S.John; E.A. 1934: The relation of the Colour and Vitamin a Content of Butter to the Nature of the Ration Fed. I. S. J. Watson, Gerald Bishop, and Jack Cecil Drummond. Influence of the Ration on the Yellow Colour of the Butter. Ii. Albert Edward Gillam, and Isidor Morris Heilbron. The Carotenoid and Vitamin a Contents of the Butter Biochem Jour 28(3): 1076-1085