Abstract
reported that the ion abundances of carbohy-present work, we analyzed maltooligosaccharides using MALDI and the sample was prepared with a cationizing agent to enhance the ionization efficiency. Nine alkali metal salts were employed as the cationizing agents and the differences in the ionization efficiencies, depending on the cationizing agents, were com-pared.We prepared the sample by mixing 1 aliquot of the 5 mM carbohydrate mixture solution with 5 aliquots of the 100 mM matrix solution, which yields an analyte to matrix ratio of 1:100. Concentrations of the alkali metal salts were 1 mM. Figure 1 shows MALDI-TOF mass spectra of the samples containing LiTFA, NaTFA, and KTFA as the cationizing agent, respec-tively. The [M + cation]
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