The following samples of biological origin were submitted to transeste
rification by means of methanolic hydrogen chloride, generated from me
thanol and acetyl chloride:triglycerides from black currant oil, butte
r, pig lard tissue, fat tissue of inner part of goose, lyophilized hum
an blood plasma, larvae of fleshfly of the genus Sarcophaga, lipid A f
rom Shigella dysenteriae, esters from beeswax and esters from the cuti
cular lipids of pea aphid Acyrthosiphon pisum. Attention was also paid
to sterol esters and to free fatty acids. Conditions of transesterifi
cations are discussed, as well as the conditions of gas chromatographi
c analysis of components after transesterification.