Commonly occurring product ions for PS(O-20:1(9Z)/37:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
1068.8941Precursor ion [M-H]-
981.8621Loss of serine from precursor ion
549.5616sn2 RCOO- ion
449.3038Loss of sn2 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
431.2932Neutral loss of sn2 RCOOH group and serine from [M-H]-
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