| abstract |
(57) [Summary] [PROBLEMS] There is no monitoring method or monitoring apparatus for measuring ppt-level dioxins and ppb-level dioxin precursors with high sensitivity. SOLUTION: An organic or inorganic compound containing an element having a high electronegativity is selectively ionized by an atmospheric pressure chemical ionization method, generated ions are detected by a mass spectrometer, and the amount thereof is quantified. [Effect] It is possible to selectively monitor an organic chlorine compound such as dioxin or a dioxin precursor by eliminating interference of main components, nitrogen, air, hydrocarbons, carbon dioxide and the like in exhaust gas. |