| 摘要 |
PROBLEM TO BE SOLVED: To reduce analysis time and collect information useful for identification and structural analysis of peptide and sugar peptide.SOLUTION: When an MSspectrum to a target sample can be acquired (S1-S6), a peak group unique to protein or the like in the MSspectrum is detected (S7). For example, a peak group including plural peaks in which arrangement of two or more amino acids can be estimated from a peak interval, and a triplet peak in which there is 32Da or 34Da interval arrangement which is unique to the plural peptides coupled by disulfide bond, are detected. The thus detected peak group is subjected to pre CID as a target of pre CID (CID which does not perform ion selection in advance), for acquiring MSspectrum (S9). The peak group has high probability that it is derived from a main structural element of peptide, and in the MSspectrum, product ions useful for identification and structural analysis are observed with high sensitivity. Since ion selection is omitted, analysis time is reduced. |
