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Die pCO2-/pO2-Optode: Eine neue p CO2- bzw. pO2-Meßsonde zur Messung des pCO2 oder pO2 von Gasen und Flüssigkeiten / The pCO2-/pO2-Optode: A New Probe for Measurement of pCO2 or pO2 in Fluids and Gases
1975
Zeitschrift für Naturforschung C - A Journal of Biosciences
To measure pO2 or pCO2 in gases or fluids the fluorescence indicators pyrene butyric acid or β-methylumbelli-feron were used, which were separated from a measuring medium by a gas-permeable membrane. For p CO2 the pH changes in NaHCO3 solution were monitored by methyl-umbelliferon. Changes in its fluorescence signal, S, were measured at λ (emission) = 445 nm. Excitation was brought about by light of wavelength λ1 = 318 nm (fluorescence signal S1) , and λ2 = 357 nm (fluorescence signal S2).
doi:10.1515/znc-1975-7-819
fatcat:vxuzvn5zsbawhmavll6wrhytdu