Commonly occurring product ions for PC(21:0/18:4(6Z,9Z,12Z,15Z))) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
858.5785Precursor ion [M.chloride]-
808.5862Loss of CH3 and chloride from precursor ion
737.5127Loss of choline and chloride from precursor ion
550.3878Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and chloride from precursor ion
532.3773Neutral loss of sn2 RCOOH group, loss of CH3 and chloride from precursor ion
500.2783Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and chloride from precursor ion
482.2677Neutral loss of sn1 RCOOH group, loss of CH3 and chloride from precursor ion
325.3112sn1 RCOO- ion
275.2017sn2 RCOO- ion
231.2118Loss 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