| 摘要 |
PROBLEM TO BE SOLVED: To provide a mass spectrometry using a matrix additive for easily and efficiently improving ionization efficiency in a mass spectrometry, and to provide a matrix additive for the mass spectrometry.SOLUTION: As an additive, methyl 3,5-dialkoxy benzoic acid, or 2,5-dialkoxy-benzoic acid, or methyl 2,5-dialkoxy-benzoic acid is used. (The carbon numbers of an alkoxy group is 2-8.) |
