Commonly occurring product ions for PE(18:3(9Z,12Z,15Z)/20:1(11Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
766.5392Precursor ion [M-H]-
506.3252Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
488.3147Neutral loss of sn1 RCOOH group from [M-H]-
474.2626Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
456.2521Neutral loss of sn2 RCOOH group from [M-H]-
309.2799sn2 RCOO- ion
277.2173sn1 RCOO- ion
152.9958Glycerol-3-phosphate ion with loss of H2O
140.0118Ethanolamine phosphate ion
122.0013Ethanolamine 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