Abstract
Summary
1. A method is described for the quantitative determination of vit. A in stool. 2. Alcoholic alkali is added to fresh stool and a uniform mixture prepared by using a magnetic stirrer. The method of extraction is described in detail. The standard percentage deviation of the difference between 2 determinations on the same stool was shown to be 5.2% and the standard deviation of the per cent recovery of added vit. A is 7.5%.
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