Commonly occurring product ions for PG(P-18:0/18:3(6Z,9Z,12Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
755.5233Precursor ion [M-H]-
681.4865Loss of glycerol from precursor ion
495.3092Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
477.2987Neutral loss of sn2 RCOOH group from [M-H]-
421.2725Loss of sn2 acyl chain as ketene (RCH=C=O) and glycerol from [M-H]-
403.2619Neutral loss of sn2 RCOOH group and glycerol from [M-H]-
277.2173sn2 RCOO- ion
245.0432Glycerophosphoglycerol ion
227.0326Glycerophosphoglycerol ion -H2O
209.0221Glycerophosphoglycerol ion -2H2O
152.9958Glycerol-3-phosphate ion with loss of H2O
96.9696H2PO4- ion (from phosphate)
78.9591PO3- ion (from phosphate)
Note: Structures of product ions may represent one of a number of possible isobaric molecules in some cases