title: 1H-NMR assay of phosphatidylcholine and phosphatidylethanolamine in AL721.
abstract: A 1H-NMR based method has been developed for the assay of phosphatidylcholine (PC), and phosphatidylethanolamine (PE) in AL721. The assay was based on the comparison of NMR signal intensities of the choline and the ethanolamine moiety of PC and PE, respectively, to the signal of imidazole, the internal standard. The assay was reliable and more accurate than the commonly used LC or TLC methods. The uncertainty, due primarily to signal intensities, of the 1H-NMR method was estimated at less than 3%.
authors.affiliation: Life Sciences Division, SRI International, Menlo Park, CA 94025.
authors.forename: A P
authors.initials: AP
authors.lastname: Cheung
authors.forename: L L
authors.initials: LL
authors.lastname: Olson
mesh_terms: D002853:Chromatography, Liquid; D004338:Drug Combinations; D005989:Glycerides / Q000032:analysis*; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D010713:Phosphatidylcholines / Q000032:analysis*; D010714:Phosphatidylethanolamines / Q000032:analysis*; D011522:Protons
chemical_list: D004338:Drug Combinations; D005989:Glycerides; D007202:Indicators and Reagents; D010713:Phosphatidylcholines; D010714:Phosphatidylethanolamines; D011522:Protons; C046637:neutral lipid, phosphatidylcholine, phosphatidylethanolamine drug combination