Commonly occurring product ions for PC(O-18:0/18:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
775.6460Precursor ion [M+]-
760.6226Loss of CH3 and from precursor ion
689.5491Loss of choline and from precursor ion
494.3616Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
476.3510Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
405.2775Loss of choline, and neutral loss of sn2 RCOOH group from precursor ion
283.2643sn2 RCOO- ion
224.0693Glycerophosphocholine with loss of CH3 and H2O
168.0431Phosphocholine with loss of CH3
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