Commonly occurring product ions for PI(19:1(9Z)/22:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
933.6438Precursor ion [M-H]-
771.5909Loss of inositol from [M-H]-
655.3828Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
637.3722Neutral loss of sn1 RCOOH group from [M-H]-
611.3202Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
593.3096Neutral loss of sn2 RCOOH group from [M-H]-
493.3300Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
475.3194Neutral loss of sn1 RCOOH group and inositol from [M-H]-
449.2674Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
431.2568Neutral loss of sn2 RCOOH group and inositol from [M-H]-
339.3269sn2 RCOO- ion
315.0487Glycerophosphoinositol -H2O
297.0381Glycerophosphoinositol -2H2O
295.2643sn1 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