Digest Of Criticisms On The United States Pharmacopoeia Sixth Decennial Revision 1880

Author : United States Convention
Publisher : Theclassics.Us
ISBN 13 : 9781230393094
Total Pages : 28 pages
Book Rating : 4.3/5 (93 download)

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Download or read book The Digest of Criticisms on the United States Pharmacopoeia, Sixth Decennial Revision Published by the Committee of Revision and Publication Of written by United States Convention and published by Theclassics.Us. This book was released on 2013-09 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 edition. Excerpt: ...the aqueous solution is washed with ether while still acid, then, after being rendered alkaline with ammonia, with ether, and finally with chloroform. Evaporate to dryness (spontaneously.and over sulphuric acid), dissolve the residue in water acidulated with sulphuric acid, and lastly titrate with Mayer's solution (half strength). 1 C.c. of the latter indicates 0.00945 Gm. of emetine. For practical purposes this process may be modified, so as to save time, and still give approximately correct results. They further controvert Fliickiger's statement that the woody portion is practically inert. The whole root assayed 2.40 p. c., the woody portion amounted to 15 p. c. of the total weight of the root, and gave 0.8 p. c.; that is, about 5 p. c. of the total emetine existed in the woody portion (B. 89, 95. E. 89, 102. O. 89, 460. N. 89, Mch, 721). According to the experience of Johnson the yield of emetine, as usually given (from 1 to 2.5 p. c.), is too low. Of 75 assays, representing 40,000 pounds, 5 gave an average of 4.15 p. c.; 6 over 3.5 p. c.; 22 over 3 p. c.; and of the remainder less than 6 gave under 2 p. c. The process followed was'Dragendorff's, modified by Lyons. See (Drug Bull., 89, 355). Jalapa. Assay. 5 Gm. of No. 50 powder are mixed with fine sand, and percolated with 250 C.c. of boiling water. The dregs are digested with 150 C.c. of hot alcohol, filtered, and evaporated to dryness. He seldom found more than 8.5 p. c. of resin. Drescher (A. 89, 340. B. 89, 156). Kino. An exhaustive investigation of the sources and physical properties of the different kinds of Australian (Eucalyptus) kino by Maiden, see (A. 89, 626. N. 89, Oct., 221; 321). He divides them into 1, the ruby group, the chief characteristics of which are the formation...