The PCO2 electrode uses which of the following?
a. HCO3– solution c. KCl solution
b. Mercury bead d. Silver anode
ANS: A
Between the Teflon membrane and the pH glass electrode is a bicarbonate-buffered solution. A mercury bead is part of a pH electrode. A KCl solution is used in the pH electrode. A silver an-ode is used in the Clark electrode.
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