Which oxygen analyzer uses a semipermeable polytetrafluoroethylene membrane to separate ox-ygen from a potassium hydroxide bath containing a gold cathode and a lead anode?
a. Paramagnetic c. Electrical
b. Galvanic d. Polarographic
ANS: B
Within the galvanic cell there is a semipermeable membrane that separates the gas sample from a hydroxide solution with a gold cathode and a lead anode. The polarographic cell uses a platinum cathode and a silver anode immersed in a potassium hydroxide bath.
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