No coin nor oath required. For personal study only.
Standardization of Cod Liver Oil. WALLACE H. DICKHART (Oil and Fat Industries, 1928, 5, 82-84) has modified his uranium nitrate test which has been noted in Journal of the Franklin Institute, 1927, 2o4, 820. In the modified test, use is made of a 6-inch test tube with an internal diameter of 20 ram. The oil (3 c.c.) and the uranyl nitrate (IO rag.) are placed upright in a 400 c.c. beaker containing 80 c.c. of water which has been heated so that it just boils. The tube is kept at this temperature for 20 minutes, then cooled, and the color of its contents measured. Certain grades of sardine oil yield a deep green color like that of chlorophyll at the end of 2 minutes in this test; this color becomes a deep red on further heating. Dickhart proposes the following standards, the color measurements being made in a Wesson tintometer using standard Lovibond glasses :--For medicinal cod liver oil, a maximum of I yellow o.I red before testing in the modified manner, and 35 yellow 3.8 red after heating as described above. For poultry oil, 1.5 yellow 0.2 red before testing and 35 yellow .5.0 red after heating. J. S. H.
๐ SIMILAR VOLUMES