Color test for rotenone: Howard A. Jones and Charles M. Smith (Ind. & Eng. Chem., Analytical Edition, 1933, v, 75–76)
✍ Scribed by J.S.H.
- Book ID
- 104129241
- Publisher
- Elsevier Science
- Year
- 1933
- Tongue
- English
- Weight
- 56 KB
- Volume
- 215
- Category
- Article
- ISSN
- 0016-0032
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✦ Synopsis
Feb., I933.] CURRENT TOPICS. 235 gram in the entire body sufficed to produce in the rat a definite polycythemia or excess of red corpuscles in the blood. Cobalt was not found in the tissues of pigs fed the basal ration, but definite quantities of cobalt were present in the tissues of pigs fed a similar ration plus cobalt salt. J. S. H.
Decomposition of Mineral
Otis by Sunlight.--L. W. GREEN AND R. E. SCHOETZOW (]our. Am. Pharm. Asso., i932, xxi, I286---I287) report that mineral oil (heavy liquid petrolatum, U. S. P.), bottled in flint glass, and exposed to the sunlight, may develop a disagreeable odor and taste. The rate of spoilage depends on the geographical source of the crude oil. The stability of such oil may be ascertained by bottling in flint glass, and then exposing to ultraviolet light for comparatively short periods of time (3 to 49 hours).
J. S. H.
Color Test for R0tenone.--HOWARD A. JONES AND CHARLES M. SMITH (Ind. & Eng. Chem., Analytical Edition, 1933, v, 75-76) described the following color reaction of the insecticide rotenone. The test will reveal the presence of as little as o.I milligram of rotenone. Mix I cc. of the acetone solution of rotenone with I cc. of dilute (I to I) nitric acid, and let stand 30 seconds. Then dilute with 8 or 9 cc. of water, and add I cc. of concentrated ammonia water. A blue color is obtained, almost identical with that yielded by bromothymol blue at pH 7.2. The insecticide deguelin, which, like rotenone, is of vegetable origin, also gives this reaction.
J. S. H.