I used triglyceride oil from corn, for development of aviation biofuels. I would like to separate various FAME or mono-alkyl esters fractions portion for saturated and unsaturated.
If you are not set up for fractional or molecular distillation, you might try urea fractionation as listed on the cyberlipid site http://www.cyberlipid.org/fattyt/fatt0002.htm