Notes: Long-chain Fatty Acid Methyl Ester Mixture contains two saturated and 11 mono- and poly-unsaturated fatty acids characterized by a terminal double bond located various distances from the omega end of the molecule. The fatty acids are isolated from fish oil and provided as methyl esters. It is intended for use as a reference standard for the detection of these long-chain fatty acids from various sample types by GC-MS. [Matreya, LLC Catalog No. 1093]