| 摘要 |
PROBLEM TO BE SOLVED: To highly precisely perform mass spectrometry with a minute amount of sample by mixing the sample inα-cyano-4-hydroxy cinnamic acid, applying the mixture to a supporting board made of a carbon-containing layer and drying it. SOLUTION: For example, a matrix solution containingα-cyano-4-hydroxy cinnamic acid is mixed in a peptide sample solution, and this mixture is applied to a glass-like carbon supporting board and dried into crystallization. In this case, fine crystals can be formed uniformly, and a sample molecule can be vaporized with lower laser intensity, while fluctuation in sensitiveness and resolution between crystals is lowered greatly.
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