| abstract |
PROBLEM TO BE SOLVED: To provide a gas monitoring device capable of appropriately quantifying the concentration of a chemical agent even when the concentration of a coexisting substance in a sample gas varies. A sample introduction unit 3 for introducing a sample gas containing a measurement target substance, a coexisting substance concentration measurement means 4 for measuring the concentration of a predetermined coexisting substance contained in the sample gas and coexisting with the measurement target substance, and a sample An ionization unit that ionizes the gas, a mass spectrometer that analyzes the mass of ions generated in the ionization unit, a data processing unit 7 that analyzes a signal detected by the mass spectrometer and calculates a concentration of the measurement target substance; The gas monitoring device 1 includes a display unit 8 for displaying the analysis result analyzed by the data processing unit 7, and the data processing unit 7 corresponds to the concentration of a predetermined coexisting substance, A gas monitoring device 1 is provided with a correcting means for correcting the concentration. [Selection] Figure 1 |