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A Rapid Method of Determining Carbonic Acids in Air. (One Figure in the Text.)

Published online by Cambridge University Press:  15 May 2009

John Haldane
John Haldane
Affiliation:
(From the Physiological Laboratory, Oxford.)
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Extract

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In almost all investigations relating to ventilation of inhabited buildings determinations of the carbonic acid present in the air are essential. The method in common use is that of Pettenkofer, or some modification of it. This method has, however, the disadvantage that the determinations necessitate the carrying to and from the laboratory of large bottles, and take a considerable time. To overcome these drawbacks several methods capable of being conveniently applied on the spot have been devised, but their accuracy is hardly sufficient for practical purposes, hence they have not come into general use.

Type
Research Article
Information
Journal of Hygiene , Volume 1 , Issue 1 , January 1901 , pp. 109 - 114
Copyright
Copyright © Cambridge University Press 1901

References

1 Journ. of Physiol., Vol. XXII. p. 465, 1898.Google Scholar

  • The more important measurements connected with the present apparatus are as follows:—

  • Internal measurement of case 8 x 13 x 3 inches.

  • Internal measurement of water-jacket 2⅝ x 1½ x 7 inches.

  • Diameter of bulbs about 1½ inches.

  • Length of graduated part of burette about 4 inches or 100 mm.

  • Thickness of wood used throughout = ⅜ inch.

  • Weight, including mercury and water, about 6 pounds.

  • The apparatus has been made for me by Messrs C. E. Muller and Co., 148 High Holborn, London.

1 The use of a control tube in gas analysis was first described by Williamson, and Russell, (Journal of the Chemical Society, 1868, p. 238)Google Scholar and afterwards applied in a greatly improved form by Pettersson, (Zeitschr. für analyt. Chemie, Vol. 25, pp. 467, 479.)CrossRefGoogle Scholar The latter along with Palmqvist has successfully applied the same principle to the determination of CO2 in the air of rooms, and devised for the purpose a special form of gas-analysis apparatus with a narrowed burette similar to that described above, which gives excellent results (Berichte der deutschen chemischen Gesellschaft, Vol. 20, p. 2129, 1887).CrossRefGoogle Scholar