Commonly occurring product ions for PE(16:0/18:1(9Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
716.5236Precursor ion [M-H]-
478.2939Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
460.2834Neutral loss of sn1 RCOOH group from [M-H]-
452.2783Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
434.2677Neutral loss of sn2 RCOOH group from [M-H]-
281.2486sn2 RCOO- ion
255.2330sn1 RCOO- ion
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