THE PREPARATION OF EGG LECITHIN

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Abstract
Lecithin completely free of amino nitrogen and having N/P ratios of 1.00 to 1.01 has been obtained by cooling 10% solutions of mixed egg phospholipides in absolute ethanol to −35 °C. and eliminating the insoluble portions by filtration. These samples of lecithin have been considerably more unsaturated (I.N. 70 to 80) than those prepared by the cadmium chloride method of Pangborn (I.N. 55).