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公开(公告)号：US10161904B2
公开(公告)日：2018-12-25
申请号：US15486040
申请日：2017-04-12
发明人： Kai Ni , Kaitai Guo , Quan Yu , Binchao Tang , Zhou Yu , Xiang Qian , Xiaohao Wang
摘要： A method for tracing a distribution of moving ions in an ion mobility spectrometer is provided, including steps: first selecting a sample having light-emitting characteristics as a tracing sample; subsequently, ionizing the tracing sample by using an ionization source, and feeding ions of the tracing sample to a drift tube of the ion mobility spectrometer; using a plate to collect the ions at a cross section to be detected; and finally processing the ions collected on the plate by using an appropriate means, thereby enabling the ions to emit light, and displaying a distribution view of movement positions of the ions on the cross section. By combining a light-emitting tracing means and movements of charged ions in an ion mobility spectrometer, it is able to master a position distribution of the charged ions in the ion mobility spectrometer more intuitively and practically.
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公开(公告)号：US10475634B2
公开(公告)日：2019-11-12
申请号：US15981490
申请日：2018-05-16
发明人： Quan Yu , Qian Zhang , Xiaohao Wang , Xiang Qian , Kai Ni
摘要： The vacuum electro-spray ion source comprises a hollow capillary, a vacuum cavity, a gas inlet pipe, a gas supply device and an adjusting device, wherein a first end of the hollow capillary is a sampling port, and a second end is used as a spray nozzle for vacuum electro-sprays and stretches into the vacuum cavity; the air pressure in the vacuum cavity is ranged from 10 to 200 Pa; one end of the gas inlet pipe stretches into the vacuum cavity, and the other end is connected with the gas supply device; and the adjusting device is configured for adjusting the gas inlet pipe to allow the gas to flow therein intermittently. The ion source may achieve electro-spray ionization in the vacuum environment, so that losses during ion transmission may be reduced to improve the signal intensity and detection limit during detection.
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