Commonly occurring product ions for PI(19:0/22:2(13Z,16Z))) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
931.6281Precursor ion [M-H]-
769.5753Loss 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]-
613.3358Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
595.3253Neutral 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]-
451.2830Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
433.2725Neutral loss of sn2 RCOOH group and inositol from [M-H]-
335.2956sn2 RCOO- ion
315.0487Glycerophosphoinositol -H2O
297.2799sn1 RCOO- ion
297.0381Glycerophosphoinositol -2H2O
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