Carbon Dioxide, Oxygen and Carbon Monoxide
The apparatus normally used for the routine analysis of flue gas is the Orsat appparatus. The gases usually estimated are carbon dioxide, oxygen and carbon monoxide.
The apparatus is illustrated in Fig. 122.1. It consists essentially of a water-jacketed gas burette, connected by a common line of coarse capillary tube and tapped connections to three absorption pipettes, containing, respectively, solutions of potassium hydroxide, alkaline pyrogallol and ammoniacal cuprous chloride.
A levelling bottle is connected to the base of the gas burette to enable readings to be taken at constant pressure and for use in transferring gas to and from the absorption pipettes
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