Commonly occurring product ions for PG(O-18:0/15:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
721.5389Precursor ion [M-H]-
647.5021Loss of glycerol from precursor ion
497.3249Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
479.3143Neutral loss of sn2 RCOOH group from [M-H]-
423.2881Loss of sn2 acyl chain as ketene (RCH=C=O) and glycerol from [M-H]-
405.2775Neutral loss of sn2 RCOOH group and glycerol from [M-H]-
245.0432Glycerophosphoglycerol ion
241.2173sn2 RCOO- ion
227.0326Glycerophosphoglycerol ion -H2O
209.0221Glycerophosphoglycerol ion -2H2O
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