4.2. Measurements
            4.2.3. Gas analysis
                4.2.3.2. Oxygen-specific
4.2.3.2.1. Oxygen electrode (Clark electrode)

Oxygen eletrode

(aka Clark electrode)

Form of polarographic electrode

Setup

Cathode: platinum

Anode: Silver/silver chloride (silver wire in silver chloride gel)

Solution: KCl

Voltage: 0.6V applied

Current flow depends on oxygen concentration

At cathode,
O2 + 4e + 2H2O
--> 4OH-

Temperature kept at 37C

NB:

Method

Disadvantage

Other points

Keywords:  Oxygen electrode
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Created20050602
Reviewed20050602


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