| 摘要 |
In a chromatograph mass spectrometer according to the present invention, an optimum gas pressure search controller (42) performs an MRM measurement for a target compound while changing a collision-gas pressure, investigates an optimum collision-gas pressure giving a highest signal strength based on the measured result, and stores the same gas pressure for each compound in a compound-related information storage section (43). When a target compound is specified in a simultaneous multicomponent analysis, a control sequence determiner (44) reads the optimum collision-gas pressure and retention time information corresponding to the specified compound from the storage section (43), prepares a control sequence which sets the gas pressure in a collision cell (31) at the optimum gas pressure at the timing where each compound is eluted, and stores the sequence in a control sequence storage section (45). According to the present invention, when a measurement on a sample is performed, the gas pressure is controlled according to the created control sequence, so that each compound can be detected with a high level of sensitivity. The present invention can be applied to LC/MS/MS and GC/MS/MS. |
