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 . owed tostand, with frequent agitation, from four to twenty-four hours.The solution is then filtered into a small separatory funnel and 5 c.c.of a dilute sulphuric acid (0.5 per cent) added, and after separationof the aqueous solution the latter is diluted with 5 c.c. of water. 1 Ether, 60 c.c; alcohol, 7.5 c.c; chloroform, 30 c.c; ammonia, 2.5 c.c. Itshould be borne in mind in this connection that probably th
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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 . owed tostand, with frequent agitation, from four to twenty-four hours.The solution is then filtered into a small separatory funnel and 5 c.c.of a dilute sulphuric acid (0.5 per cent) added, and after separationof the aqueous solution the latter is diluted with 5 c.c. of water. 1 Ether, 60 c.c; alcohol, 7.5 c.c; chloroform, 30 c.c; ammonia, 2.5 c.c. Itshould be borne in mind in this connection that probably the modified Prolliussolution does not extract all the alkaloids in the various drugs equally well. 524 SCIENTIFIC AND APPLIED PHARMACOGNOSY This solution of 10 c.c. contains 0.00225 gramme of the alkaloids ofnux vomica. Calculating 20 drops as being equivalent to 1 c.c, we have 20 X 10 c.c. = 200 drops. Then 200 drops of liquid containapproximately .00225 gramme of alkaloids and 1 drop contains2ihr X .00225 = .00001125 gramme. A few drops of this solution, in a watch crystal, should give with the following reagents distinctivereactions. Mayers reagent, a pronounced white precipitate.. Fig. 221.—Nux Vomica: H, fragments of lignified hairs of seed-coat; B, basalportion of hairs; E, thick-walled parenchyma cells of endosperm containingone or more oil globules and protoplasm; P, isolated protoplasmic substancefrom endosperm cells. Potassium permanganate and sulphuric acid, a purple color thatis evanescent. Potassium dichromate and sulphuric acid, a purple color that ismore persistent. Gold chloride solution gives a very slight yellow precipitate. Constituents.—Ash 1 to 4 per cent; chlorogenic (formerly calledigasuric) acid, which is dibasic acid and crystallizes in needles, thesolutions giving a green color with solutions of ferric chloride; 1.5 to5 per cent of alkaloids consisting of strychnine and brucine, the formercomprising from one-third to one-half of the total amount. Stry