5.3.4 Conductometry
The carbon in the sample is ignited in a stream of oxygen in a furnace to produce carbon dioxide. Together with the oxygen, the combustion gases are drawn off by a pump through a tube containing percarbamide which absorbs the oxidation products of the sulfur contained in the sample.
The carbon dioxide is absorbed in sodium hydroxide solution and its amount calculated from the change in conductivity.
An example of the conductometry apparatus is given in Figure 5.