Commonly occurring product ions for PS(18:0/32:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
986.7795Precursor ion [M-H]-
899.7474Loss of serine from precursor ion
633.4865Loss of sn1 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
615.4759Neutral loss of sn1 RCOOH group and serine from [M-H]-
479.4834sn2 RCOO- ion
437.2674Loss of sn2 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
419.2568Neutral loss of sn2 RCOOH group and serine from [M-H]-
283.2643sn1 RCOO- 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