Commonly occurring product ions for PC(13:0/22:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
775.6097Precursor ion [M+]-
760.5862Loss of CH3 and from precursor ion
689.5127Loss of choline and from precursor ion
564.4035Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
546.3929Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
438.2626Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
420.2521Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
339.3269sn2 RCOO- ion
224.0693Glycerophosphocholine with loss of CH3 and H2O
213.1860sn1 RCOO- ion
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