Commonly occurring product ions for PC(16:0/5:0(COOH)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
646.3492Precursor ion [M.chloride]-
596.3569Loss of CH3 and chloride from precursor ion
525.2834Loss of choline and chloride from precursor ion
480.3096Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and chloride from precursor ion
462.2990Neutral loss of sn2 RCOOH group, loss of CH3 and chloride from precursor ion
358.1273Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and chloride from precursor ion
340.1167Neutral loss of sn1 RCOOH group, loss of CH3 and chloride from precursor ion
255.2330sn1 RCOO- ion
224.0693Glycerophosphocholine with loss of CH3 and H2O
168.0431Phosphocholine with loss of CH3
152.9958Glycerol-3-phosphate ion with loss of H2O
133.0506sn2 RCOO- ion
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