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Analytic electrospray ionization device

An electrospray ionization and electrospray technology, which is applied in the direction of measuring devices, analyzing materials, and material analysis by electromagnetic means, can solve the problems of sample loss and monitoring sensitivity reduction, so as to avoid sample loss, improve detection sensitivity, and expand applications. range effect

Active Publication Date: 2021-02-05
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an analytical electrospray ionization device capable of analyzing liquid or particle samples, which solves the problems of serious sample loss and reduced monitoring sensitivity when traditional electrospray ionization devices analyze liquid or particle samples

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Embodiment 1

[0024] Example 1. refer to figure 1 . An analytical electrospray ionization device, characterized in that it includes an electrospray assembly and a hollow guide assembly;

[0025] The spray assembly includes a hollow metal tube 4 with two ends open, and a quartz capillary 2 coaxial with the metal tube 4 and two ends open is provided inside the metal tube 4. One end of the quartz capillary 2 is used as the sample inlet port 1, and the other end is As the ion outlet port 6; the end of the metal circular tube 4 on the same side as the sample inlet port 1 is used as the inlet port 3, and the other end is used as the gas outlet port 7, and the metal tube 4 is connected to the high-voltage power supply through a wire;

[0026] The hollow guide assembly includes a hollow quartz cylinder 8 with two ends open, one open end of the quartz cylinder 8 is sealed and connected to the gas outlet end 7 of the metal round pipe 4, and the quartz cylinder 8 is set at the same time as the metal...

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Abstract

The invention relates to an analytic electrospray ionization device, and aims to solve the problem that an existing electrospray ionization device cannot be used for ionization detection of a liquid surface or a powder sample. The analytic electrospray ionization device comprises a spray assembly and a hollow flow guide assembly, and the spray assembly and the hollow flow guide assembly are coaxial and are installed at one end of the hollow flow guide assembly in a sealed mode. Only charged ions reach a to-be-analyzed surface by utilizing ion diversion and gas diversion, and airflow is prevented from impacting the to-be-analyzed surface, so that the device can be used for in-situ analysis and two-dimensional imaging analysis of powder on the surface of liquid and the surface of a to-be-detected object, and the application range is expanded.

Description

technical field [0001] The invention relates to an analytical electrospray ionization device, in particular to an analytical electrospray ionization device provided with a gas diversion function. Background technique [0002] Analytical electrospray ionization (DESI) is an ionization technique that utilizes reagent reaction ions formed by electrospray under atmospheric pressure and analyzes surface samples of objects. It is widely used as an ion source for mass spectrometers. Under the action of sheath gas-assisted nebulization and desolvation, the solvent volatilizes to form sample ions, which enter the mass spectrometer for analysis. [0003] The sheath gas generally uses high-purity nitrogen with a pressure of tens or even more than a hundred atmospheres. DESI is especially suitable for the ionization of biological macromolecules, such as proteins and peptides. When analyzing liquid or particle samples, the high-pressure airflow will cause the liquid to splash and the pa...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 刘忠伟王正铎杨丽珍王卫国
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION