Qualitative Organic Analysis; An Elementary Course in the Identification of Organic Compounds

Qualitative Organic Analysis; An Elementary Course in the Identification of Organic Compounds

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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. 1922 edition. Excerpt: ...met in technical products, is work for the specialist. Attempts have been made toward the systematic grouping of dyes based upon chemical reactions. Thus the scheme of Rota1 is based 1 Chem. Zeit. 1898,437. upon the behavior of dyes towards various reducing and oxidizing agents. Rota has suggested the following classification: TABLE XX Unknown In 1: 10,000 Solution (water Or Alcohol) Treat with dilute HC1 and SnClu Further discussion of this scheme of classification and the methods used for subdivision of the four main classes is not justifiable in the space available here. Effective work in connection with the identification of dyes usually requires also actual dyeing experiments. A particularly valuable physical property which is utilized in connection with the identification of dyes is the absorption spectrum of dye-solutions. A more recent and far more extensive treatment for the identification of dyes has been developed by Mulliken; Identification of Pure Organic Compounds, Vol. III. About fifteen hundred dyes are classified in this extended treatise. The method of attack is as follows: (1) Homogeneity test (a) water, (6) sulfuric acid, (c) fractional dyeing, (d) capillary absorption, (e) spectroscopy, (2) General appearance and color, (3) Solubilities in water, alcohol, sulfuric acid, (4) Tests for sulfur dyes, (5) Direct dyeing of wool and cotton, (6) Dyeing with hydrosulfite vat, (7) Dyeing with sodium sulfide vat. Preliminary Tests: Generic or Divisional Tests: Coordination Tests: (8) Discharge of direct wool dyeings by sodium formaldehyde sulfoxylate, (9) Restoration of color by air, (10) Restoration of color by potassium persulfate, (11) Color discharges and returns on vat dyed cotton. Action of H2SO4 on textile dyeings, Action of NaOH...show more

Product details

  • Paperback | 58 pages
  • 189 x 246 x 3mm | 122g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236591836
  • 9781236591838