| 摘要 |
PROBLEM TO BE SOLVED: To provide a small size ion detection device capable of swiftly and easily performing mass spectrometry under atmospheric pressure.SOLUTION: In an ionization region part 5a, which is enclosed by a voltage application electrode 6a, a detection electrode 7a and a material the coefficient of water absorption is zero, a semiconductor alcohol sensor head 3a is disposed on the detection electrode 7a via an electrical insulation material. When an expired air is introduced from a sample introduction port 2a, only water cluster which has a positive electric charge collides with the detection electrode. Thus, detectable signals and an alcohol value detected by the alcohol sensor are measured.SELECTED DRAWING: Figure 1 |
