Commonly occurring product ions for PI(17:2(9Z,12Z)/22:2(13Z,16Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
899.5655Precursor ion [M-H]-
737.5127Loss of inositol from [M-H]-
651.3515Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
633.3409Neutral loss of sn1 RCOOH group from [M-H]-
581.2732Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
563.2627Neutral loss of sn2 RCOOH group from [M-H]-
489.2987Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
471.2881Neutral loss of sn1 RCOOH group and inositol from [M-H]-
419.2204Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
401.2099Neutral loss of sn2 RCOOH group and inositol from [M-H]-
335.2956sn2 RCOO- ion
315.0487Glycerophosphoinositol -H2O
297.0381Glycerophosphoinositol -2H2O
265.2173sn1 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