COMPOUNDS SEPARATION FROM ETHYL-ACETATE, BY GLC, USING STATIONARY-PHASE BINARY-MIXTURES

The compounds identified in ethyl acetate which was obtained by Tiscen ko reaction approach-homogeneous catalysis with aluminium ethoxide-are : acetaldehyde, ethyl vinyl ether, acetone, methyl acetate, ethanol, d iethyl acetat, crotonaldehyde, isobutyl acetate, butyl acetate, parald ehyde. The compounds identification was achieved by GC - MS coupling. The separation was accomplished using four columns packed with: 25% w/ w Carbowax 20M, UCON 50 HB-2000 Hallcomid M 18, Squalane on 100/120 me sh Chromosorb W. As some pairs of compounds overlapped: acetone and me thyl acetate, ethyl vinyl ether and acetaldehyde, diethyl acetal and e thyl acetate, (Carbowax 20M): acetone and methyl acetate, ethanol and ethyl acetate (Hallcomid M 18), acetone and methyl acetate (Ucon 50 HB -2000); isobutylacetate and paraldehyde(Squalane), we propose the use of binary mixtures of these liquid stationary phases in window analysi s method. The best separation was obtained with UCON 50 HB-2000 + Squa lane at 100 degrees C (W-Squalane = 25,5%).