DBD (Dielectric Barrier Discharge) high-efficiency ionization source and application thereof

Abstract

The invention relates to a DBD high-efficiency ionization source. The ionization source comprises an insulated discharge cavity, a discharge electrode, a first pair of tablet-shaped leading-out electrodes and a second pair of tablet-shaped leading-out electrodes; the discharge cavity is a hollow enclosed cavity which is filled with rare gas; the upper and lower sidewalls of the insulated dielectric cavity include the quartz material, the outer walls of the upper and lower sides of the quartz material are provided with the first pair of tablet-shaped leading-out electrodes respectively, the right sidewall of the insulated discharge cavity is provided with a through whole which serves as a window, the window is sealed by an optical window sheet, and the left sidewall, corresponding to the window, of the discharge cavity is plated with a reflective film; and the side, far from the reflective film, of the window is provided with the first pair of the tablet-shaped leading-out electrodes and the second pair of tablet-shaped leading-out electrodes. The ionization source is combined with a mass spectrum or an ion migration spectrum in use, use of a radioactive ionization source can be avoided, the sensitivity of the mass spectrum or the ion migration spectrum is improved, and the ionization source is helpful for industrialization of the mass spectrum or the ion migration spectrum.

Description

technical field [0001] The invention relates to an ionization source in an analytical instrument, specifically a dielectric barrier discharge high-efficiency ionization source technology, specifically using the VUV light generated by the discharge to ionize the sample gas, and using this new ionization technology for ion mobility spectrometry , will be able to avoid the use of radioactive ionization sources, improve the sensitivity of ion mobility spectrometry, and facilitate the industrialization of ion mobility spectrometry. Background technique [0002] Ion mobility spectrometry is a detection technique developed in the 1970s. Its separation principle is to characterize various compounds through the mobility of gaseous ions. It has the advantages of high detection sensitivity, fast measurement response, small instrument size, and low cost. It has been widely used in the detection of chemical poisons, drugs, dangerous goods, and volatile organic pollutants in the atmospher...

AI Technical Summary

Problems solved by technology

However, since the discharge chamber is an open system, changes in humidity and composition will lead to unstable discharge; in addition, a large number of high-energy electrons and ions will be generated during discharge, and these high-energy electrons and ions will directly interact with the sample to generate a large number of fragment ions, making the spectrum parsing difficulty

Images