Figure 2From: Benzimidazole, coumrindione and flavone derivatives as alternate UV laser desorption ionization (LDI) matrices for peptides analysisMALDI mass spectra of cholic acid ( M. wt =  408.58 Da, 0. 1 μ M), recorded in reflector mode by averaging 600 laser shots with smart beam ( 355 nm) on MALDI- TOF- MS by applying different compounds as a matrix ( A) 6 ( B) 25 ( C) 29 ( D) HCCA.Back to article page