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

m/zIon DescriptionStructure (click to enlarge)
705.5314Precursor ion [M+]-
690.5079Loss of CH3 and from precursor ion
619.4344Loss of choline and from precursor ion
508.3409Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
490.3303Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
424.2470Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
406.2364Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
283.2643sn2 RCOO- ion
224.0693Glycerophosphocholine with loss of CH3 and H2O
199.1704sn1 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