抄録
A new method has been developed for continuous determination of pCO2 of blood in vivo. When the carrier, pure water, is in contact with the sample solution containing carbon dioxide through a semipermeable membrane, the carbon dioxide will pass to the carrier at a rate proportional to the partial pressure. If the carrier is flowing at a constant mass flow rate, the carbon dioxide density of the carrier is proportional to the pCO2 of the sample. Thus, all we have to do is to measure the carbon dioxide density of the carrier in order to know the pCO2 of the sample. Instead of the direct measurement of the density, we determined the electric conductivity variation of the carrier which was caused by the carbon dioxide passed through the membrane from the sample.
Satisfactory results were obtained in continuous determination of pCO2 of sample solutions containing different electrolytes, with various viscosities and temperatures.
