Electrospray ion source and mass spectrometer

A technology of electrospray ion source and mass spectrometer, which is applied in the field of analytical instruments, can solve the problems that samples are easily polluted and affect the mobility of ESI source, and achieve the effects of reducing sample consumption, simplifying structure and reducing dead volume

Active Publication Date: 2012-10-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

Samples are susceptible to contamination during this process, and the required syringe pump also affects the mobilit

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  • Electrospray ion source and mass spectrometer
  • Electrospray ion source and mass spectrometer
  • Electrospray ion source and mass spectrometer

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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with preferred specific embodiments.

[0022] The present invention provides an electrospray ion source. In one embodiment, it includes a hollow capillary, a vacuum cavity, an electrode and a DC power supply. One end of the hollow capillary is used as a sampling end, and the other end is used as an electrospray nozzle. The nozzle and the sampling end are in different air pressure environments, the nozzle extends into the vacuum cavity, the air pressure of the nozzle is lower than the air pressure of the sampling end, and the electrode is placed in the vacuum chamber. In the vacuum chamber and behind the shower head, the electrode is provided with a channel for the electrospray to pass through, and the DC power supply is applied between the hollow capillary and the electrode, wherein the air pressure of the shower head is the same as that of the spray hea...

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Abstract

The invention discloses an electrospray ion source, which comprises a hollow capillary tube, a vacuum chamber, electrodes and a direct-current power supply. One end of the hollow capillary tube is used as a sampling end, the other end of the hollow capillary tube is used as an electrospray nozzle, the nozzle and the sampling end are arranged in different pressure environments, the nozzle extends into the vacuum chamber, the pressure for the nozzle is lower than the pressure for the sampling end, the electrodes are arranged in the vacuum chamber and behind the nozzle and are provided with a channel for electrospray to pass through, and the direct-current power supply is applied between the hollow capillary tube and the electrodes. The electrospray ion source can be used as a simple ionization device to generate stable ion flow, and is particularly suitable for use as an ion source of a portable mass spectrometer, and the true real-time online field detection and analysis and electrospray ionization can be realized.

Description

technical field [0001] The invention relates to the field of analytical instruments, in particular to an electrospray ion source and a mass spectrometer. Background technique [0002] Mass spectrometer is one of the most sophisticated modern analytical instruments and represents the future development direction of analytical instruments. The ion source is the most basic functional component in the mass spectrometer system, which determines the analytical performance and application range of the mass spectrometer to a certain extent. Electrospray ionization (Electrospray Ionization, ESI) was first proposed by the Dole group and applied to mass spectrometry as an ionization technology. In the late 1980s, Nobel Prize winner John B. Fenn and others first applied it Since then, this technology has greatly promoted the development of the field of mass spectrometry analysis of macromolecules. Today, ESI has become the most widely used ion source in mass spectrometry, and its appl...

Claims

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Application Information

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IPC IPC(8): H01J49/16H01J49/04
Inventor 余泉倪凯王晓浩唐飞
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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