Sib: This paper describes a very rapid technique for preparing methyl esters from triglycerides and other lipids. The method should find wide interest, particularly incommercial fat and oil laboratories. We had long been interested in extending the BF3-methanol esterification procedure (3) to the direct formation of methyl esters from triglycerides, phospholipids, poly-esters, andother lipids. Interesterification techniques were first explored. However, even after refluxing a triglyc-eride one hour with BF3-methanol, the transesterification was still incomplete. A transesterification technique was recently reported that uses benzene as a solvent combined with BF3-methanol