Commonly occurring product ions for PI(32:0/18:2(9Z,12Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
1057.7690Precursor ion [M-H]-
895.7161Loss of inositol from [M-H]-
795.5393Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
777.5287Neutral loss of sn2 RCOOH group from [M-H]-
633.4865Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
615.4759Neutral loss of sn2 RCOOH group and inositol from [M-H]-
595.2889Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
577.2783Neutral loss of sn1 RCOOH group from [M-H]-
479.4834sn1 RCOO- ion
433.2361Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
415.2255Neutral loss of sn1 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
297.0381Glycerophosphoinositol -2H2O
279.2330sn2 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