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

m/zIon DescriptionStructure (click to enlarge)
832.5862Precursor ion [M-H]-
524.2783Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
522.3565Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
506.2677Neutral loss of sn1 RCOOH group from [M-H]-
504.3460Neutral loss of sn2 RCOOH group from [M-H]-
327.2330sn2 RCOO- ion
325.3112sn1 RCOO- ion
283.2431Loss of CO2 from sn2 RCOO- ion (PUFA)
152.9958Glycerol-3-phosphate ion with loss of H2O
140.0118Ethanolamine phosphate ion
122.0013Ethanolamine 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