Figure 5: Effect of combination of alkali metal salts and matrices on MALDITOF MS pattern of GM3. MALDI-TOF MS spectra of GM3 (100 pmol) after preparation with DHB, LiCl 4 nmol, and various concentrations of CsCl (A) 40 nmol, (B) 4 nmol, (C) 400 pmol, and (D) 40 pmol. MALDI-TOF MS spectra of GM3 (100 pmol) after preparation with Norharman, LiCl (4 nmol), and various concentrations of CsCl (E) 40 nmol, (F) 4 nmol, (G) 400 pmol, (H) 40 pmol. ▼, ▽, ◆, and * indicate sodium adducts, lithium adducts, cesium adducts, and background ions, respectively.