Commonly occurring product ions for PC(18:0/22:6(4Z,7Z,10Z,13Z,16Z,19Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
833.5940Precursor ion [M+]-
818.5705Loss of CH3 and from precursor ion
747.4970Loss of choline and from precursor ion
552.3096Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
534.2990Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
508.3409Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
490.3303Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
327.2330sn2 RCOO- ion
283.2643sn1 RCOO- ion
283.2431Loss of CO2 from sn2 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