Commonly occurring product ions for PI(O-20:0/16:1(9Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
849.5862Precursor ion [M-H]-
687.5334Loss of inositol from [M-H]-
613.3722Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
595.3617Neutral loss of sn2 RCOOH group from [M-H]-
451.3194Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
433.3088Neutral loss of sn2 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
297.0381Glycerophosphoinositol -2H2O
259.0225Inositol phosphate ion
253.2173sn2 RCOO- 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