Recommended methods for the purification of solvents and tests for impurities: 1,2-Ethanediol and 2,2,2-Trifluoroethanol

Abstract

Abstract - Specifications for the comercially available solvent, relevant physicochemical and key solvent properties are given. The procedures for purification include removal of water, production of conductivity-grade solvent, and removal of bases and heavy metals. Gas chromatography is best for detection of organic impurities and flameless atomic absorption for heavy metals. Methods for the determination of water depend on its concentration.