Commonly occurring product ions for PI(O-20:1(11Z)/20:4(5Z,8Z,11Z,13E)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
897.5862Precursor ion [M-H]-
735.5334Loss of inositol from [M-H]-
611.3566Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
593.3460Neutral loss of sn2 RCOOH group from [M-H]-
449.3038Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
431.2932Neutral loss of sn2 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
303.2330sn2 RCOO- ion
297.0381Glycerophosphoinositol -2H2O
259.2431Loss of CO2 from sn2 RCOO- ion (PUFA)
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