| 摘要 |
PROBLEM TO BE SOLVED: To provide a monitor apparatus and a monitor method capable of measuring the concentration of a sample to be measured, which is changed in ionizing efficiency by the effect of an impurity component and adsorbed by a pretreatment part/piping, in a real time with high accuracy by adding a standard sample with known concentration to gas to be measured. SOLUTION: The concentration of a sample to be measured is measured while a standard sample with known concentration, which is almost same to the sample to be measured in a change in ionizing efficiency and a physical property value such as vapor pressure or the like, is added. The ionic strength of the sample to be measured is compared with that of the added standard sample to calibrate the concentration of the sample to be measured. The concentration of the substance to be measured in gas containing various impurity substances can be measured on-line within a real time with high accuracy while corrected hourly.
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