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. 2009 Sep 7;53(8):779–787. doi: 10.1093/annhyg/mep055

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© The Author 2009. Published by Oxford University Press [on behalf of the British Occupational Hygiene Society].

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 5. — Relation between simultaneously measured oxygen and CO₂ levels in 26 stairway air samples. The slope of the regression line of −1.425 (forced through the normal ambient atmospheric conditions of 20.9% O₂ and 0.035% CO₂ at the y-intercept) suggests that the CO₂ released in to the air corresponds to close to 70% of the oxygen depletion. The dashed line describes the stoichiometric relation of 1 between oxygen depletion and CO₂ formation.