Probe electrospray ionization mass spectrometer

摘要

Under the control of the control unit (25), the probe drive unit (21) collects a sample (8) at the tip of the probe (6) by lowering and raising the probe (6). After that, the high voltage generator (20) applies a high voltage to the probe (6) whose voltage value increases in a slope shape, while the mass spectrometer after the capillary tube (10) has a two-stage probe. Product ion scan measurement for voltage is executed, and the mass spectrometric data obtained in each measurement is stored in the first and second probe voltage corresponding data storage units (301 and 302). If the ionization efficiencies of the plurality of types of components contained in the sample (8) have a probe voltage dependence, ion peaks derived from different types of components appear in the two mass spectra. As a result, a plurality of types of components contained in the sample can be roughly separated, and the identification performance based on the mass spectrum and the quantitative performance based on the chromatogram can be improved.