Figure 4.
ESI mass spectrometric total ion chromatograms of diluted extracts of mouse myocardial lipids in both positive-and negative-ion modes. Total ion counts of the ionized lipid solution in both positive (A) and negative (B) ion modes were acquired in the mass range of m/z 400–1000 at a scan rate of 1 s/scan for a total of 50 min.