Abstract

Hog bile salts when mixed with sulfuric acid and benzaldehyde give a purple color, but this test is unsuitable for the detection of hog bile in mixtures with ox or sheep bile salts, which produce a brown color obscuring the purple color. A quantitative separation of hog bile from sheep or ox bile is described. The principle involved depends upon the action of hydrochloric acid which precipitates hog bile from solution in the form of a gummy mass, whereas with ox or sheep bile only slight precipitates are formed under the conditions of the test described.

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