Direct titration of carbon dioxide

A brief survey is given of the most important methods for the determination of carbon dioxide, and the suitability of these methods is briefly discussed.Details are given of a direct carbon dioxide titration method developed for the detection and determination of substances separated on a gas-liquid partition column.The titration is performed in pyridine or acetone as a solvent and with a sodium methylate solution as a titrant.Results are given of determinations of carbon dioxide in air and, on semi-micro and micro scales, of carbon dioxide obtained by combustion of organic compounds.It is suggested that the proposed method will be generally applicable, e.g.: (1) to the micro and semi-micro determination of carbon and oxygen, (2) to the determination of carbon dioxide formed in wet-combustion analysis, (3) to the determination of carbon in steel.