The Chemical Gazette, Or, Journal of Practical Chemistry, in All Its Applications to Pharmacy, Arts and Manufactures Volume 5

The Chemical Gazette, Or, Journal of Practical Chemistry, in All Its Applications to Pharmacy, Arts and Manufactures Volume 5

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1847 edition. Excerpt: ...by Gobleyf in the yolk of egg, it was a matter of interest to test its correctness and applicability. For this purpose, the author treated an aqueous solution of pure lactate of copper with milk of lime free from potash, and found that, on the addition of but little milk of lime, still so much that lime remained suspended in the fluid, the filtered solution assumed a pale blue colour, whilst on the application of a little more milk of lime it became perfectly colourless. When treated with a few drops of muriatic acid and some sulphuretted hydrogen, the solution yielded a troubling so slight that it could only be perceived by looking perpendicularly through the test-tube. When the colourless solution which contained the small quantity of oxide of copper in solution was again treated with a little milk of lime and filtered, it did not give the slightest reaction on the addition of sulphuretted hydrogen or ferrocyanide of potassium. If freshly-precipitated hydrated oxide of copper be added to a solution of lactate of lime, it is dissolved, but completely re-precipitated by milk of lime. Hence the presence of lactic acid renders the complete precipitation of the oxide of copper difficult, but does not prevent it; moreover there are a large number of organic bodies irluch do the same; Pelouze mentions saccharine substances only. The author found this to occur with gela-Ann. de Chim. et de Phys., 3rd ser. t. xv. p. 97. f Chem. Caz. vol. iii. pp. 443, 486. tine, glycocolle, impure lactate of lime, muriate of ammonia, cane-and grape-sugar, gelatine after ebullition with potash, fibrine, albumen and caseine; with the last six of these bodies the solution was intensely coloured. Hence, although the author does not deny the existence of lactic acid in...show more

Product details

  • Paperback | 232 pages
  • 189 x 246 x 12mm | 422g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236670396
  • 9781236670397