Effective molecular mass (mass:charge)

Figure 3 Electrospray ionization mass spectrometry analysis of phospholipid compositions of selected mouse tissue. Total lipids were extracted from liver, lungs, pancreas, and spleen using chloroform:methanol and then analyzed for PC (A-E) and PI (F-J) using diagnostic mass spectrometry scans. The distribution of the phospholipid molecular species in these illustrative spectra is given by the response of the individual ions, presented relative to the predominant ion on display. The identities of the major PC and PI species identified were confirmed by diagnostic fragmentation analysis by tandem MS/MS. (Dombrowsky H, Bernhard W, Rau G, Clark G and Postle A, unpublished results.)

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