QUANTITATIVE DETERMINATION OF ETHYLENE GLYCOL IN COOLANT MEDIA BY INFRARED ANALYSIS

摘要

This report describes the application of infrared analysis to the quantitative determination of ethylene glycol in a mixture of glycols.nThe method utilizes the base line technique in conjunction with a working curve. Two unique analytical features of the method are the saturation of the glycol mixtures with sodium chloride to prevent attack of the rock salt cell window by the small amounts of water normally present in glycol mixtures, and the use of dimethyl formamide as a transparent solvent for the glycols. The dissolved ethylene glycol is treated as a minor constituent of the mixture and the absorption recorded differentially. A correction is made for the presence of diethyl glycol.nIt is recommended that this method be used for the analysis of ethylene glycol in glycol mixtures, and that the method be studied further for possible application to other constituents of coolant media.