In an Optical Sensing (Optode)system for the Measurement of PO₂

question 13

Multiple Choice

In an optical sensing (optode) system for the measurement of PO₂ using fluorescence,what is being measured?

• A) The increase in the intensity of the oxygen's natural fluorescence
• B) The amount of charge passing between the optical sensing electrodes,which is directly proportional to the PO₂
• C) The decrease in intensity of an organic dye's fluorescence in the presence of molecular oxygen,which is proportional to the PO₂
• D) The ability of oxygen in solution to carry current under the influence of a potential difference

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