Commonly occurring product ions for PI(13:0/18:4(6Z,9Z,12Z,15Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
787.4403Precursor ion [M-H]-
625.3875Loss of inositol from [M-H]-
591.2576Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
573.2470Neutral loss of sn1 RCOOH group from [M-H]-
529.2419Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
511.2314Neutral loss of sn2 RCOOH group from [M-H]-
429.2048Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
411.1942Neutral loss of sn1 RCOOH group and inositol from [M-H]-
367.1891Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
349.1786Neutral loss of sn2 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
297.0381Glycerophosphoinositol -2H2O
275.2017sn2 RCOO- ion
259.0225Inositol phosphate ion
241.0119Inositol phosphate ion - H2O
231.2118Loss of CO2 from sn2 RCOO- ion (PUFA)
223.0013Inositol phosphate ion - 2 H2O
213.1860sn1 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