You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Estimation of Small Quantities of Carbon Dioxide in Air by the Absorption of Infra-Red Radiation
Herbert Dingle and A. W. Pryce
Proceedings of the Royal Society of London. Series B, Biological Sciences
Vol. 129, No. 857 (Dec. 31, 1940), pp. 468-474
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/82280
Page Count: 7
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
This paper describes an investigation of the possibility of measuring small amounts of carbon dioxide in air by the absorption of infra-red radiation. It is shown that the method is simple, trustworthy and accurate, and is very sensitive for small amounts of carbon dioxide, of the order of that present in ordinary air. The principle is applied in a form superior to any hitherto used, in that the whole of the transmitted radiation is measured instead of merely the radiation at the maximum of a particular absorption band. This makes a spectrometer unnecessary, eliminates the disturbing effect of variation of temperature, and allows much less sensitive detecting apparatus to be used. The only preliminary treatment necessary is the removal of water vapour from the air under examination.
Proceedings of the Royal Society of London. Series B, Biological Sciences © 1940 Royal Society