A convenient method for the rapid estimation of carotene in butterfat

Autor: Willis D. Gallup, A. H. Kuhlman
Rok vydání: 1941
Předmět:
Zdroj: Oil & Soap. 18:71-73
ISSN: 1558-9331
0003-021X
DOI: 10.1007/bf02543615
Popis: A simple method is described for determining the carotene content of butterfat under conditions where extreme accuracy is not required. A direct comparison is made of the color of the melted fat with that of known concentrations of potassium dichromate solution. Since there is no loss of fat from dilution or in transferring from one container to another, the method is adaptable to small samples that later can be used for the determination of the usual fat-constants. The dichromate solutions are prepared by dilution of measured amounts of a 0.2 per cent stock solution to a volume of 25 ml. These dilute solutions and the fat samples are contained in cylindrical sample bottles of uniform diameters and their color matched with the aid of a comparator block placed before a “day-light” lamp.
Databáze: OpenAIRE
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