Commonly occurring product ions for PE(20:0/18:4(6Z,9Z,12Z,15Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
766.5392Precursor ion [M-H]-
508.3409Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
490.3303Neutral loss of sn2 RCOOH group from [M-H]-
472.2470Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
454.2364Neutral loss of sn1 RCOOH group from [M-H]-
311.2956sn1 RCOO- ion
275.2017sn2 RCOO- ion
231.2118Loss of CO2 from sn2 RCOO- ion (PUFA)
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