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Ion mobility tube and applications thereof

A technology of ion transfer tube and ion gate, which is applied in the field of ion transfer tubes, can solve problems such as human hazards, and achieve the effects of small size of the instrument, improved rapid identification and analysis capabilities, and fast detection speed

Inactive Publication Date: 2012-05-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

but 63 The radioactivity of Ni has certain harm to the human body in application

Method used

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  • Ion mobility tube and applications thereof
  • Ion mobility tube and applications thereof
  • Ion mobility tube and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] image 3 The background signal diagram of the vertical lamp UV photoemission ion mobility spectrum in pure nitrogen is given, and the photoemission has only electron peaks in pure nitrogen.

Embodiment 2

[0043] Figure 4 The measurement spectra of carbon tetrachloride, trichlorethylene, tetrachloroethylene, methylene bromide and methyl iodide under the unidirectional flow of high-purity nitrogen are given. It can be seen from the figure that the chlorinated hydrocarbons only have a reduced mobility of 2.68cmV -1 the s -1 The characteristic peak; Dibromomethane produces a reduced mobility of 2.62cmV -1 the s -1 The characteristic peak, methyl iodide produces a reduced mobility of 2.59cmV -1 the s -1 characteristic peaks.

Embodiment 3

[0045] Figure 5 Shown are the detection spectra of trichlorethylene, tetrachloroethylene and methyl iodide in positive ion mode. It can be seen from the figure that the reduced mobilities of the characteristic peaks of trichlorethylene, tetrachlorethylene and methyl iodide in the positive ion mode are 2.26, 2.12 and 1.91 cmV, respectively -1 the s -1 . Due to CCl 4 The ionization energy of the ionization energy is greater than that of ultraviolet light, and it cannot be ionized in the positive ion mode, and its spectrum cannot be obtained. In this way, it can be distinguished from trichlorethylene and tetrachlorethylene, and can be distinguished based on the difference in the positive ion spectrum of trichlorethylene and tetrachlorethylene.

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Abstract

The invention relates to an ion mobility tube. The ion mobility tube comprises a repulsion pole, an ionization source, an ion gate and a Fraday's disk in turn, wherein the ultraviolet light path of an ultraviolet light source is perpendicular to the axial direction of an ion mobility tube; one end of the Fraday's disk of the ion mobility tube is provided with a makeup gas inlet, the side wall of the ion mobility tube in a reaction zone is provided with a carrier gas inlet, and the repulsion pole or the side wall of the ion mobility tube, close to the repulsion pole is provided with a gas outlet. The ion mobility tube is used to detect halohydrocarbon compounds, and the measurement results of positive and negative modes can be combined to accurately identify the halohydrocarbon compounds and increase the sensitivity of the ion mobility spectrometry to the compounds of which ionization energy is lower than the ultraviolet ionization energy in the negative ion mode.

Description

technical field [0001] The invention provides an ion transfer tube and its application, in particular to a new method for identifying and detecting halogenated hydrocarbon compounds. This method is used for the detection of halogenated hydrocarbon compounds and avoids the ion The effect of baseline drift and photochemical reactions induced on the gate facilitates the identification and identification of the product ions formed. Background technique [0002] Haloalkane compounds, such as carbon tetrachloride, trichlorethylene and tetrachloroethylene, are common volatile organic pollutants in the urban atmosphere, and are also the objects of research by many scholars. They are mainly emitted from human activities, as industrial raw materials, solvents, extractants and cleaning agents, etc., and have a wide range of emission sources in cities. For example, trichloroethylene (Trichloroethylene, abbreviated as TCE) is an excellent solvent and a substitute for benzene and gasolin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/26G01N27/62G01N27/622
Inventor 李海洋程沙沙陈创杜永斋韩丰磊王卫国
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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