Commonly occurring product ions for PG(12:0/22:4(7Z,10Z,13Z,16Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
741.4712Precursor ion [M-H]-
667.4344Loss of glycerol from precursor ion
559.3042Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
541.2936Neutral loss of sn1 RCOOH group from [M-H]-
485.2674Loss of sn1 acyl chain as ketene (RCH=C=O) and glycerol from [M-H]-
467.2568Neutral loss of sn1 RCOOH group and glycerol from [M-H]-
427.2103Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
409.1997Neutral loss of sn2 RCOOH group from [M-H]-
353.1735Loss of sn2 acyl chain as ketene (RCH=C=O) and glycerol from [M-H]-
335.1629Neutral loss of sn2 RCOOH group and glycerol from [M-H]-
331.2643sn2 RCOO- ion
287.2744Loss of CO2 from sn2 RCOO- ion (PUFA)
245.0432Glycerophosphoglycerol ion
227.0326Glycerophosphoglycerol ion -H2O
209.0221Glycerophosphoglycerol ion -2H2O
199.1704sn1 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