Commonly occurring product ions for PC(18:4(6Z,9Z,12Z,15Z)/19:1(9Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
793.5627Precursor ion [M+]-
778.5392Loss of CH3 and from precursor ion
707.4657Loss of choline and from precursor ion
520.3409Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
502.3303Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
500.2783Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
482.2677Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
295.2643sn2 RCOO- ion
275.2017sn1 RCOO- ion
231.2118Loss of CO2 from sn1 RCOO- ion (PUFA)
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