Commonly occurring product ions for PA(18:0/22:6(4Z,7Z,10Z,13Z,16Z,19Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
747.4970Precursor ion [M-H]-
481.2361Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
463.2255Neutral loss of sn1 RCOOH group from [M-H]-
437.2674Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
419.2568Neutral loss of sn2 RCOOH group from [M-H]-
327.2330sn2 RCOO- ion
283.2643sn1 RCOO- ion
283.2431Loss of CO2 from sn2 RCOO- ion (PUFA)
171.0064Glycerol-3-phosphate ion
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