| 摘要 |
<p>The MS analysis is performed for each of microscopic areas within a specified mass spectrometry range on a sample, and specified m/z or m/z range of distribution images are generated in accordance with the data derived from the MS analysis to be drawn on a display screen (S10 to S14). When an operator views such images to identify a substance of interest, and indicates the pertinent m/z (S15), microscopic areas the m/z intensity of which exceeds a threshold on the MS spectrum are extracted, and the MS/MS analysis is performed for the microscopic areas using m/z of the substance of interest as a precursor (S26, S27). An average MS/MS spectrum is calculated from the derived MS/MS spectrum data for each of the microscopic areas (S28), and the substance of interest is identified by the use of peak information appearing on the average MS/MS spectrum (S19).</p> |
