Methods of Gas Analysis

Methods of Gas Analysis

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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. 1892 edition. Excerpt: ...dish, 1 R. Fresenius, Anleitung zur quant. Analyse, 6th ed., Part I. p. 505. Also Zeitschr. f. analyt. ChemU, 10, 75. and pour a hot concentrated solution of from 30 to 35 grams of copper sulphate over it. Evaporate the solution to dryness with constant stirring, place the dish in an air-or oil-bath, whose temperature is kept between 150 and 160 C, and let it remain there four hours. A tube containing 14 grams of this copper sulphate pumice-stone takes up about 2 grams of hydrogen sulphide. To make sure of complete absorption two such tubes should always be used. When the pumicestone is less thoroughly dried, it takes up a much smaller amount of hydrogen sulphide, and when it has been dried at a higher heat--until it has lost its water of crystallisation--it causes a decomposition of the hydrogen sulphide and the evolution of sulphur dioxide. Hydrogen sulphide can also be determined by passing the gas through a solution of bromine in water, precipitating the sulphuric acid thus formed with barium chloride, and weighing as barium sulphate. According to Bunsen1 it is possible to determine the hydrogen sulphide of a gas mixture containing hydrogen, nitrogen, carbon dioxide, hydrocarbons, etc., by means of balls of manganese dioxide. The purest pyrolusite is ground to a very fine powder, and is then stirred with sufficient distilled water to make a thin paste. The balls are made from this paste by pressing it in a bullet-mould which has been rubbed with oil. The balls are dried in an airbath, and are then covered with a concentrated sirupy solution of phosphoric acid. 1 Bunsen, Gasometrische Methoden, 2d ed., p. 111. One volume of water absorbs at 76 cm. pressure, and at temperatures between 0 and 20, at t, 79789-2-6077 + 0-029349 volumes of sulphur...show more

Product details

  • Paperback | 78 pages
  • 189 x 246 x 4mm | 154g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236634020
  • 9781236634023