File:Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists (1920) (14803493923).jpg

Identifier: scientificapplie00krae (find matches)
Title: Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists
Year: 1920 (1920s)
Authors: Kraemer, Henry, 1868-1924
Subjects: Pharmacognosy
Publisher: New York, Wiley
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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of a softmass, sometimes almost semi-liquid. Asafetida yields a milk-white emulsion when triturated with water,which becomes yellowish on the addition of solutions of the alkalies.Treated with strong hydrochloric acid, the filtrate gives a blue fluor-escence on making it alkaline with ammonia water (distinguishing itfrom ammoniac). The freshly fractured tears give a greenish coloron the application of a few drops of 40 per cent nitric acid solu-tion (distinguishing it from galbanum). Not less than 60 per cent of Asafetida should dissolve in alcohol.The alcoholic solution becomes cherry-red, upon the addition of afew drops of a solution of phloroglucinol and a few drops of hydro-chloric acid. An alcoholic solution of Asafetida becomes olive green,upon the addition of a solution of ferric chloride (absence of mostforeign resins). An alcoholic solution of Asafetida is colored bluish-green upon the addition of a few drops of hydrochloric acid, the 498 SCIENTIFIC AND APPLIED PHARMACOGNOSY
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Fig. 213.—Asafetida. X-ray photographs of several kinds of Asafetida, thedark colored fragments being inorganic substances, through which the X-rays do not penetrate. A, mass of ordinary gum resin with considerableinorganic material. B, selected tears, which are almost wholly soluble inalcohol. C, stony Asafetida, consisting of fragments of gypsum which havebeen coated with a thin layer of Asafetida.—After Wilbert. AMMONIAC 499 color fading upon standing (absence of galbanum). An aqueousemulsion is not colored red upon the addition of a solution of sodiumhypobromite (absence of ammoniac). A petroleum benzin solutionshould not give a bluish-green color upon shaking it with a solution(1 in 20) of copper acetate (detection of colophony). In order to powder Asafetida it is dried at a temperature nothigher than 30° C. or placed over freshly burnt lime. It is com-minuted, preferably at a low temperature, and diluents of starch ofmagnesium carbonate are sometimes added, in order to pres

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