Commonly occurring product ions for PI(12:0/20:5(5Z,8Z,11Z,14Z,17Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
799.4403Precursor ion [M-H]-
637.3875Loss of inositol from [M-H]-
617.2732Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
599.2627Neutral loss of sn1 RCOOH group from [M-H]-
515.2263Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
497.2157Neutral loss of sn2 RCOOH group from [M-H]-
455.2204Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
437.2099Neutral loss of sn1 RCOOH group and inositol from [M-H]-
353.1735Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
335.1629Neutral loss of sn2 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
301.2173sn2 RCOO- ion
297.0381Glycerophosphoinositol -2H2O
259.0225Inositol phosphate ion
257.2275Loss of CO2 from sn2 RCOO- ion (PUFA)
241.0119Inositol phosphate ion - H2O
223.0013Inositol phosphate ion - 2 H2O
199.1704sn1 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