Notes: Bacterial Fatty Acid Methyl Ester Mixture 1 contains seven saturated branched and straight chain fatty acid methyl esters. It is intended for use as a reference standard for the detection of fatty acids of primarily microbial origin by GC-MS. This mixture is supplied in an amber ampule in which the headspace has been purged with nitrogen/argon to prevent lipid oxidation. [Matreya, LLC. Catalog No. 1105]