Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn.
- Sohn, Charles E.
- Date:
- 1894
Licence: Public Domain Mark
Credit: Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn. Source: Wellcome Collection.
Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.
179/210 page 167
![Froiide's Solution (29).] Emetine, r.~vgn. Ergotinine, v.~vbl. Fumarine, v.-wdark gn. Hydrastine, gn.~vbn. Tmperialine, see II. Laurotetanine, indigo-bl. Loxopterigine, v.~vbl. Morphine, see I. Narceine, see II. Narcotine, gn. Papaverine, gn.~vbl.-wv.~vcherry. Pareirine, bl. Quebrachine, bl. Quinidine, greenish. Quinine, greenish. Tylophorine, bright gn. Ilia. Non-basic substances giving green or blue colours. Absynthiin, see Ila. CLASSIFICATION OF REACTIONS, ETC. Phlorrhizin, bl. Phloretin, bl. IV. The following alkaloids give no colours. Alstonidine. Aricine. Atropine. Chairamine. Cinchonine. Coniine. Delphinine, see II. Hyoscy amine. Nicotine. Theine (Caffeine). Theobromine. Strychnine. 30. VITALIS TEST. — Evaporation with fuming nitric acid at 100° C, then touching the residue with a drop of alcoholic potash solution freshly prepared. Atropine, magnificent violet, changing gradually to cherry-red. Brucine, greenish. Homatropine, yellow. Strychnine, red. Veratrine, similar to Atropine.* Other alkaloids that were similarly tested gave negative results. 31. GERRARD TEST.—To ^ grain of free alkaloid about 20 drops of a 2 per cent, solution of mercuric chloride in proof-spirit are added gradually, avoiding excess. * If the test be modified by substituting nitrous acid or a nitrite for the nitric acid, and aqueous for alcoholic potash; atropine still gives a reddish-violet whilst veratrine produces a yellow coloration (E. Beckmann). Pp. red or yellow. Atropine, immediate red coloration, then pp. Homatropine, red pp. Hyoscyamine, at first yellow colora- tion, then red pp. (no pp. if excess of reagent). Scoparin, yellow pp. No red or yellow pp. (a white pp. is frequently obtained). Aconitine. Arbutin, G., no pp. Brucine. [P ERMANGANATE OF POTASH (32). Cinchonidine. Cinchonine. Cocaine (white pp.). Codeine. Condurangin, no pp. Coniine. Gelsemine. Hyoscine, no coloration. Morphine. Quinidine. Quinine. Sparteine, no pp. Strychnine, no pp. Theine, no pp. 167 32. PERMANGANATE OF POTASH, added to a solution of the hydrochloride salt of the alkaloids, gives the following results (Beckurt and List, Pharm. J. Trans., and Jakresb., 1886, II.). I. Immediate oxidation and pp. of Manganese Peroxide. Aconitine. Brucine. Cinchonamine. Cinchonidine. Cinchonine. Codeine. Colchicine. Coniine. Nicotine. Physostigmine. Quinine. Thebaine. Veratrine. II. Red solution, oxidation being slower than with alkaloids under I. Atropine. Berberine. Hyoscyamine. Pilocarpine. Piperine. Strychnine. III. Alkaloids behaving in an exceptional manner. Apomorphine, intense green. Morphine, white crys. pp. ( = Oxidi- morphine). Cocaine, stable light violet pp. of Cocaine Permanganate (charac- teristic). Narceine ~) also give permanga- Narcotine >- nate salts, but which Papaverine J are not stable.](https://iiif.wellcomecollection.org/image/b21503023_0179.jp2/full/800%2C/0/default.jpg)
