Commonly occurring product ions for PC(18:0/18:2(9Z,12Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
820.5629Precursor ion [M.chloride]-
770.5705Loss of CH3 and chloride from precursor ion
699.4970Loss of choline and chloride from precursor ion
508.3409Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and chloride from precursor ion
504.3096Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and chloride from precursor ion
490.3303Neutral loss of sn2 RCOOH group, loss of CH3 and chloride from precursor ion
486.2990Neutral loss of sn1 RCOOH group, loss of CH3 and chloride from precursor ion
283.2643sn1 RCOO- ion
279.2330sn2 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