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

m/zIon DescriptionStructure (click to enlarge)
681.4865Precursor ion [M-H]-
423.2881Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
405.2775Neutral loss of sn2 RCOOH group from [M-H]-
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