Commonly occurring product ions for PC(20:0/20:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
845.6879Precursor ion [M+]-
830.6644Loss of CH3 and from precursor ion
759.5909Loss of choline and from precursor ion
536.3722Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
536.3722Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
518.3616Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
518.3616Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
311.2956sn2 RCOO- ion
311.2956sn1 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