An Ion Molecular Reaction Mass Spectrometry System

An ion-molecule and reaction system technology, applied in the field of ion-molecule reaction mass spectrometry system, can solve the problems of complicated instrument, prolonged transmission distance, increased ion loss, etc., and achieves the effect of compact overall structure, improved comprehensive analysis ability, and avoidance of sample ion loss.

Active Publication Date: 2020-04-07
天津智谱仪器有限公司
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Problems solved by technology

However, the setting of the ion transmission system makes the instrument complicated, and the extension of the transmission distance also increases the ion loss

Method used

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  • An Ion Molecular Reaction Mass Spectrometry System

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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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Abstract

The invention provides an ion molecular reaction mass spectrum system including a hollow cathode discharge power source which is connected with a reagent gas source at the front end and which is connected with an ion molecular reaction system at the rear end; a mass analyzer located behind the ion molecular reaction system, wherein ion paths inside the mass analyzer and the ion molecular reactionsystem are angled; a deflection system disposed between and communicating with the mass analyzer and the ion molecular reaction system; and a to-be-measured gas source communicating with the ion molecular reaction system through a pipeline. By using the deflection system to screen sample ions, the ion molecular reaction mass spectrum system is compact in overall structure, avoids sample ion loss caused by long-distance transmission, greatly expands the types of instrument detection, improves the instrument's comprehensive analysis capabilities, and is especially suitable for the detection of volatile organic compounds.

Description

technical field [0001] The invention belongs to the field of on-line analysis and detection of gas molecules, in particular to an ion molecule reaction mass spectrometry system. Background technique [0002] Chemical ionization is a commonly used ionization method in mass spectrometry. The principle is as follows: firstly, the reactant gas is ionized, and the ionized reactant gas ions react with the analyte molecules (M) to ionize the analyte. According to the type of chemical reaction, there are positive chemical ionization and negative chemical ionization. The ion-molecule reactions that occur in positive chemical ionization mainly include proton transfer reactions, charge exchange reactions, and electrophilic addition reactions; the ion-molecule reactions that occur in negative chemical ionization mainly include electron capture reactions and anion addition reactions. As a tool for studying the reaction of ions and molecules, chemical ionization source mass spectrometry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/06H01J49/42
CPCH01J49/063H01J49/42
Inventor 孙运蒋学慧褚美娟张国辉汪曣
Owner 天津智谱仪器有限公司
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