The invention discloses a detection method and a device for
ion mobility spectrometry of
excited state molecular collision surface
desorption ionization, an
excited state generator is arranged in front of an
ion entrance of a mobility tube of the
ion mobility spectrometry, a placement region of the samples to be measured is arranged between the
excited state generator and the
ion mobility spectrometry, which is exposed in the
atmosphere directly, the excited state generator includes a
discharge cavity, the front end of the interior of the
discharge cavity is connected with a
discharge part, the back end of the discharge part is equipped with an ion filter door and an exclusion
electrode sequentially, the back end of the exclusion
electrode is an outlet of the discharge cavity, and an ion introducing
electrode is arranged in the mobility tube of the
ion mobility spectrometry. The invention can work in the open atmospheric environment, the measured surface does not need the pretreatment, the invention can realize the
desorption ionization and
rapid detection in situ of the trace components on the surface of the object, the invention can not only be used for analysis and detection of the surface
pesticide residues, but can also be applicable to the detection of the toxic and harmful
dangerous goods on the surface of the object. The invention is characterized by
rapid detection speed, high sensitivity, small volume of the device, easy operation and so on.