Patent ID: 9715999
Date: 2017-07-25
CPC Classifications: G01N,H01J

Claim:
1. A chromatograph mass spectrometer including a chromatograph for separating compounds in a sample and a mass analyzer for making an ion having a specific mass-to-charge ratio among ions originating from a compound in a sample separated by the chromatograph undergo a dissociation by a collision with collision gas within a collision cell and for detecting a product ion produced by the dissociation, the chromatograph mass spectrometer comprising: a) a gas supplier for supplying the collision gas to the collision cell; b) a compound information storage section for storing retention time information and optimum collision-gas pressure information for each compound; and c) an analysis controller for retrieving the retention time information and the optimum collision-gas pressure information for a target compound designated as a measurement target from the compound information storage section, and for controlling the gas supplier based on the retrieved information so as to regulate a collision-gas pressure according to a timing at which the target compound is introduced from the chromatograph into the mass analyzer.