A study of octadecenoic acids by gas-liquid partition chromatography and infrared spectrophotometry

Summary The separation of methyl esters of octadecenoic acids by G.L.P.C. on a capillary column is shown for a sample of hydrogenated commercial vegetable oil. Comparisons are made with a regular packed column G.L.P.C., a capillary column G.L.P.C., and with infrared analysis. Good separation of methyl oleate and methyl elaidate was accomplished, using a capillary column. The amount of elaidate found by G.L.P.C. compared well with thetrans-acid found by infrared analysis. In addition, a small amount of a component was detected that is possibly another isomer of methyl oleate.