초록

For measuring dioxins and organic nitro compounds with high sensitivity while reducing complexity, efficiently ionize a sample using negative corona discharge; then, make use of a mass spectrometer to measure negatively charged ions produced.

대표청구항 ▼

1. An analytical apparatus comprising:a sample introduction section for introducing a gas sample; a corona discharge chamber having a needle electrode; a gas feed pump for continuously introducing a sample gas to the corona discharge chamber; a corona discharge power supply for applying a negative v

1. An analytical apparatus comprising:a sample introduction section for introducing a gas sample; a corona discharge chamber having a needle electrode; a gas feed pump for continuously introducing a sample gas to the corona discharge chamber; a corona discharge power supply for applying a negative voltage to the needle electrode; a mass analyzer section for mass-analyzing ions created by corona discharge; and means for adjusting a pressure in the corona discharge chamber to a desired level higher than atmospheric pressure, the pressure being adjusted by a dead weight arranged at a surplus gas exhaust port that controls external release of surplus gases.