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

m/zIon DescriptionStructure (click to enlarge)
695.4657Precursor ion [M-H]-
437.2674Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
429.2048Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
419.2568Neutral loss of sn2 RCOOH group from [M-H]-
411.1942Neutral loss of sn1 RCOOH group from [M-H]-
283.2643sn1 RCOO- ion
275.2017sn2 RCOO- ion
231.2118Loss 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