Mass spectrometer and mass spectrometry method

A mass spectrometer configured to perform mass spectrometry analysis on a to-be-measured sample including a reference sample, the reference sample having a known reference value of a mass-to-charge ratio of a peak obtained through mass spectrometry analysis, the mass spectrometer comprising:

• an analysis range setting reception unit configured to receive a setting of a mass-to-charge ratio range corresponding to an analysis range of mass spectrometry analysis;
• a storage unit configured to store, in advance, reference values of mass-to-charge ratios of a plurality of peaks obtained through mass spectrometry analysis performed on a reference sample;
• a reference value selection unit configured to read the reference values of the mass-to-charge ratios of the plurality of peaks from the storage unit and select a reference value of a mass-to-charge ratio of a specific peak from among the reference values thus read;
• a mass spectrometry unit configured to perform mass spectrometry analysis on a to-be-measured sample including the reference sample;
• and
• a data acquisition unit configured to acquire mass spectrum data obtained through mass spectrometry analysis performed on the to-be-measured sample in a data acquisition range, the data acquisition range including the mass-to-charge ratio range whose setting has been received by the analysis range setting reception unit and a margin provided adjacent to both ends of the mass-to-charge ratio range,
• wherein
• the reference value selection unit selects a reference value of a mass-to-charge ratio of a peak that lies in a range of the margin from among the reference values of the mass-to-charge ratios of the plurality of peaks stored in the storage unit, and when no reference value of a mass-to-charge ratio of a peak lies in the range of the margin, the reference value selection unit selects a reference value of a mass-to-charge ratio of a peak that lies outside the analysis range but closest to the range of the margin from among the reference values of the mass-to-charge ratios of the plurality of peaks stored in the storage unit, and
• a data acquisition unit acquires, when no reference value of a mass-to-charge ratio of a peak lies in the range of the margin, mass spectrum data in a data acquisition range in which the margin is expanded to allow the reference value selected by the reference value selection unit to lie in the data acquisition range, the mass spectrum data being obtained through mass spectrometry analysis performed on the to-be-measured sample.