Commonly occurring product ions for PG(21:0/22:6(4Z,7Z,10Z,13Z,16Z,19Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
863.5808Precursor ion [M-H]-
789.5440Loss of glycerol from precursor ion
555.2729Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
553.3511Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
537.2623Neutral loss of sn1 RCOOH group from [M-H]-
535.3405Neutral loss of sn2 RCOOH group from [M-H]-
481.2361Loss of sn1 acyl chain as ketene (RCH=C=O) and glycerol from [M-H]-
479.3143Loss of sn2 acyl chain as ketene (RCH=C=O) and glycerol from [M-H]-
463.2255Neutral loss of sn1 RCOOH group and glycerol from [M-H]-
461.3038Neutral loss of sn2 RCOOH group and glycerol from [M-H]-
327.2330sn2 RCOO- ion
325.3112sn1 RCOO- ion
283.2431Loss of CO2 from sn2 RCOO- ion (PUFA)
245.0432Glycerophosphoglycerol 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