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Non-radioactive ion migration tube

An ion transfer tube and radioactive technology, applied in the direction of ion source/gun, particle separator tube parts, etc., can solve the problems of weak reactivity, radiation problem, transportation and treatment, and the influence of ion mobility spectrometer application and promotion, etc. , to achieve the effect of solving the radioactive problem

Active Publication Date: 2016-06-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

However, its radiation problem has brought changes to the operation, transportation and handling, and has seriously affected the application and promotion of ion mobility spectrometers.
So far, a variety of non-radioactive ionization sources such as photoionization and discharge ionization have been combined with ion mobility spectrometers, but CO is often generated in negative ion mode. 3 - , NO x - Reactive reagent ions such as, due to the limitation of reactivity and electron affinity, the electron affinity cannot be determined or the reactive compound is weak

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Embodiment 1

[0031] Using the non-radioactive ion transfer tube of the present invention, the beam direction of the vacuum ultraviolet lamp and the airflow direction in the ionization zone are 90 degrees, the carrier gas flow rate is 300mL / min, the drift flow rate is 500mL / min, and the temperature of the transfer tube is room temperature (25°C). ), the reagent molecule acetone is added to the carrier gas, and the measured reagent ion O 2 - The ion mobility spectrum of image 3 shown.

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Abstract

The invention is based on reagent module auxiliary photo ionization technology, and provides a non-radioactive ion migration tube. Reagent ions which are generated by the ion migration tube are mainly O<2-> and are same with the reagent ions that are generated by a radioactive ionization source. The non-radioactive ion migration tube well settles a radiation problem under a precondition that an ion migration tube measuring function is not affected.

Description

technical field [0001] The invention designs a non-radioactive ion migration tube based on ion migration spectrum and reagent molecule assisted photoionization technology. Background technique [0002] Ion Mobility Spectrometry (IMS) technology is a separation and detection technology that appeared in the 1970s. Compared with traditional technologies such as mass spectrometry and chromatography, it has the characteristics of simple structure, high sensitivity, and fast analysis speed, and has been widely used. Used in explosives screening, drug inspection and online monitoring of VOCs, etc. Ion mobility spectrometer is mainly composed of ion source, ion gate, migration region and detector. The ion source makes the sample molecules, N 2 , O 2 When ionized with water vapor, the generated ions can easily react with molecules to obtain a variety of product ions. Driven by the electric field, the ions enter the migration region through the periodically opened ion gate, and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/02H01J49/16
Inventor 李海洋周庆华陈创彭丽英蒋丹丹刘骥巍
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI