Abstract
A procedure is described by means of which the rates of CO2 elimination from small animals, from seeds, or from samples of surviving tissues, can be determined and registered automatically by a strip‐chart recorder. The specimen under study is placed in a closed‐circuit arrangement in which CO2 is absorbed in a Sr(OH)2 solution. The registration of the CO2 liberation is based on the change in the electrical conductivity of the Sr(OH)2 solution which occurs during the CO2 absorption. The proposed arrangement is suitable for the determination of a quantity of CO2 up to 5 μM. When this amount of CO2 is liberated in less than one hour, an accuracy of ± 0.5 per cent can easily be obtained.
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