| abstract |
Provided is a matrix for MALDI mass spectrometry, which has a high ability of ionizing a low-molecular-weight compound and enables the measurement in a negative ion mode.nA matrix for MALDI mass spectrometry, comprising at least one compound selected from the group consisting of compounds each represented by general formula (I), (II) or (III) and salts thereof.nIn the formulae, X and Z independently represent C or N; R 1 and R 5 independently represent an atom or a group selected from the group consisting of H, an alkyl group, a (substituted) aryl group, a (substituted) arylalkyl group and a (substituted) heteroaryl group; R 2 and R 6 independently represent an atom or a group selected from the group consisting of H, an alkyl group, an alkoxyl group, an amino group, a halogen atom, a nitro group, an allyl group, a (substituted) aryl group and a (substituted) heteroaryl group; and R 7 and R 8 independently represent an atom or a group selected from the group consisting of H and an amino group (wherein a case in which R 1 = R 2 = H and a case in which R 7 = R 8 = an amino group are excluded). |