Commonly occurring product ions for PI(18:3(6Z,9Z,12Z)/20:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
887.5655Precursor ion [M-H]-
725.5127Loss of inositol from [M-H]-
627.3515Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
609.3409Neutral loss of sn1 RCOOH group from [M-H]-
593.2732Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
575.2627Neutral loss of sn2 RCOOH group from [M-H]-
465.2987Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
447.2881Neutral loss of sn1 RCOOH group and inositol from [M-H]-
431.2204Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
413.2099Neutral loss of sn2 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
311.2956sn2 RCOO- ion
297.0381Glycerophosphoinositol -2H2O
277.2173sn1 RCOO- ion
259.0225Inositol phosphate ion
241.0119Inositol phosphate ion - H2O
223.0013Inositol phosphate ion - 2 H2O
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