DRIED WHOLE EGG POWDER: III. A REFRACTOMETRIC METHOD FOR THE DETERMINATION OF SOLUBILITY

1 July 1943

journal article
Published by Canadian Science Publishing in Canadian Journal of Research

Vol. 21d (7) , 203-210
https://doi.org/10.1139/cjr43d-016

Abstract

The refractometric determination of the solubility of dried, whole egg powder was found to be affected by the method of defatting, the nature of the fat and protein solvents, the ratio of protein solvent to powder, the method of equilibration, and time of extraction. These factors were standardized by defatting egg powder with petroleum ether and extracting for a period of two hours with a 5% solution of sodium chloride. The refractometric value of the extract was determined at 25 °C. using an Abbé refractometer.The refractometric value was linearly related to the content of water soluble nitrogen of whole powder and to the potassium chloride value of defatted powder. A curvilinear relation was obtained with the content of crude albumin nitrogen and with the potassium chloride value of whole egg powder.

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