RAPID ANALYSIS OF ANTIFREEZE USING GAS-LIQUID CHROMATOGRAPHY.

Glycols and glycol ethers are used as freezing point depressants in permanent type antifreeze formulations, the type and amount being dictated by environmental conditions. The formulation and maintenance of a suitable antifreeze for automotive application, imposes the need for test methods that are capable of determining the composition of concentrates as well as used antifreeze. The report describes an analytical procedure which is consonant for the identification and determination of glycols and ether-alcohols as they occur in used and unused antifreezes, with no interference from water, inhibitors, and other additives. The various components are separated using gas-liquid chromatography; qualitative and quantitative information is obtained by relating the position and magnitude of each peak to that of an internal standard. (Author)