Analyzers

Published on 01/06/2015 by admin

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Last modified 01/06/2015

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Analyzers

I Oxygen Analyzers

A Analyzers operating on the polarographic principle (Clark electrode) (Figures 37-1 and 37-2)

FIG. 37-1 The Clark electrode. See Figure 37-2 for specifics.

FIG. 37-2 The basic principle of the polarographic electrode. The chloride ion will react with the silver anode to form silver chloride, an oxidation reaction that produces electrons. Oxygen will react with platinum and water, using electrons (a reduction reaction). The flow of electrons can be measured as a current. The greater the concentration of oxygen in solution, the greater the current used.

1. The basic overall chemical reaction occurring in electrode system is

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