Digest of criticisms on the United States pharmacopoeia, seventh decennial revision, 1890 / published by The Committee of Revision and Publication of the Pharmacopoeia of the United States of America.

Date:
1897-1898
Catalogue details

Licence: Public Domain Mark

Credit: Digest of criticisms on the United States pharmacopoeia, seventh decennial revision, 1890 / published by The Committee of Revision and Publication of the Pharmacopoeia of the United States of America. Source: Wellcome Collection.

    119/160 (page 111)
    Pimenta. McPherson found a .sani])le of berries, coated with ferric oxide (probably Armenian bole). (Ph. Jl. 97, Jan'y 75. Proc. 97, 548. Dr. Circ. 97, 117.) Pix Liquida. Identification of different varieties of tar. I. Completely soluble in 95-p. c. acetic acid. A. French turpentine dissolves it comijletely. The petroleum ether extract of the tar is colored greenish, when shaken with a dilute solution of cupric acetate (1:1,000). Chloroform and ab.solute ether dissolve it completely.—Pine Tar. B. Turpentine oil dissolves it only partially. The petroleum ether extract is not colored by copper acetate solution. Chloroform and absolute ether do not entirely dissolve it. —Beech Tar. II. Not completely soluble in 95-p. c. acetic acid. A. Turpentine oil dissolves it completelj^ a. Aniline di.s.solves it completely. The aqueous extract (1:20) yields a red coloration with a dilute solution of ferric chloride (1:1,000).—Juniper Tar. b. Aniline does not dis.solve it completely. The aqueous extract is colored greenish by ferric chloride.—Birch Tar. B. Turpentine oil dissolves it only partiall}'. Benzol, chloro- form, absolute ether and olive oil di.«solve it only partially. —Aspen Tar. Hirschsohn (Ph. Ztg. 97, 396. Ph. Zts. Ru.ssl. 97. . . . Merck's Rep. 97, 465.) (Platinum.) Phosphates. Action. Strattou finds, that when phosphates are heated in a platinum vessel in the presence of carbon, a marked erosion and eventually an absolute fusion of the metal may result. (Ph. Jl. 97, Aug. 157.) Reaction. Limit of sensitiveness. Neuman (Ph. Ztg. 97, 123.) (Plumbum.) Reaction. Limit of sensitiveness. Neuman (Ph. Ztg. 97, 123.) Plumbi Ac etas. Lalcium. Hausniann has found calcium in every .specimen ex- amined, and as this might interfere with the accurate estimation, he propo.ses to precipitate the calcium with potassium dichromate. (A. Jl. Ph. 97, 570.)