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Home > History and Archaeology > History > The Detection of Poisons and Strong Drugs: (English)
The Detection of Poisons and Strong Drugs: (English)

The Detection of Poisons and Strong Drugs: (English)

          
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About the Book

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. 1905 edition. Excerpt: ...nitric acid. When the latter has been evaporated completely, moisten the residue with a few drops of water, and add enough dry sodium carbonate to make the mass distinctly alkaline. Thoroughly dry this residue, and mix in a mortar with several times the quantity of a mixture of 3 parts of sodium carbonate and 1 part of potassium cyanide. Transfer this mixture to a porcelain boat, and place in an ignition-tube of hard glass. Heat in a stream of carbon dioxide, and arsenic in the mixture will be reduced to the metallic condition. (Fig. 12.) Dry the Fresenius-Von Babo Apparatus. (a) Carbon dioxide generator; (b) Drying-bottle with pure, concentrated sulphuric acid; (c) Ignition-tube and boat. carbon dioxide by passing it through pure, concentrated sulphuric acid. To remove moisture, heat the ignition-tube gently at first, where the boat is, and afterwards ignite at a bright red heat. A mirror of arsenic will appear upon the cooler part of the tube. It should be examined further, as already described. A simpler method of detecting arsenic, by means of potassium cyanide, consists in heating the perfectly dry Fig. 13. material, containing arsenic (AsO. As2S3), in a bulb-tube with a dry mixture of sodium carbonate and potassium cyanide, until fusion takes place. When the tube has been made smaller above the bulb, the arsenic mirror will form in the constricted area (Fig. 13). Other Arsenic Tests. 1. BettendorfPs Test, --(Arsenic Test of German Pharmacopoeia, IV edition.) This test is based upon the fact, that a concentrated stannous chloride solution will precipitate metallic arsenic from arsenious acid in the cold, and from arsenic acid with heat. In this test, it is advisable to use stannous chloride solution, prepared according to the..


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Product Details
  • ISBN-13: 9781458914507
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 80
  • Series Title: English
  • Weight: 159 gr
  • ISBN-10: 145891450X
  • Publisher Date: 01 Apr 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 4 mm
  • Width: 189 mm

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