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Ion gun used under atmospheric pressure

An ion gun and atmospheric pressure technology, applied in the field of mass spectrometry, can solve problems such as complex structures, and achieve the effects of improved mass measurement accuracy, good sensitivity and stability

Active Publication Date: 2011-11-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, dual nozzles have been used to introduce sample ions and internal standard ions into the mass analyzer at the same time by using two separate cone electrodes located on the main body of the mass spectrometer. Although it is feasible, the structure is more complicated.

Method used

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Embodiment Construction

[0010] In describing and claiming the present invention, the following terms will be used in accordance with the following definitions.

[0011] The term "insulating tube" refers to a material that does not substantially conduct electrical current. Typical insulating materials exhibit less than about 10 -5 conductivity, and preferably less than about 10 -5 Siemens / cm.

[0012] The term "ground" or "ground potential" refers to the meaning generally understood by those skilled in the art. Ground is the reference potential or zero potential of an electronic system or combination of electrical systems.

[0013] The term "ion" is used in its traditional sense to mean an electrically charged atom or molecule, ie, an atom or molecule containing a variable number of protons and electrons. Positive ions contain more protons than electrons, while negative ions contain more electrons than protons.

[0014] The ion gun under atmospheric pressure of the present invention will be descr...

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Abstract

The invention discloses an ion gun used under an atmospheric pressure. The ion gun comprises a liquid introduction joint, a conductive liquid guide piece, a connecting joint, a connecting piece, a transparent tube, a spraying capillary tube, an auxiliary gas introduction tube and a metal electrode, wherein the liquid introduction joint, the conductive liquid guide piece, the connecting joint, theconnecting piece and the transparent tube are connected in sequence and are used for transmitting the liquid introduced by the liquid introduction joint; the conductive liquid guide piece and the metal electrode are respectively used for being electrically connected with the electrode joint of an outer power supply; the spraying capillary tube passes through the connecting piece and the interior of the connecting joint and is connected with the conductive liquid guide piece; the auxiliary gas introduction tube penetrates into the cavity of the connecting piece so as to provide auxiliary gas; and the metal electrode is connected with the transparent tube and the port of the metal electrode is used as the gunpoint of the ion gun.

Description

technical field [0001] The invention relates to the field of mass spectrometry, in particular to an ion gun under atmospheric pressure. Background technique [0002] The ion source is an important part of the mass spectrometer. Its function is to ionize the molecules of the sample to be analyzed and form gas-phase ions, and then send the gas-phase ions to the mass analyzer for detection, so as to perform qualitative and quantitative analysis of the sample. At present, the ion sources of mass spectrometers mainly include electron ionization sources, fast atom bombardment sources, matrix-assisted laser desorption / ionization sources, atmospheric pressure chemical ionization sources, and electrospray ionization sources. [0003] Electrospray ionization (Electrospray Ionization, ESI) is a soft ionization technology. Compared with other ionization technologies, it basically does not generate fragment ions, is easy to form multiply charged ions, and is convenient for separation tec...

Claims

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Application Information

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IPC IPC(8): H01J49/10H01J49/02H01J49/42
Inventor 辛斌马力坡王光辉
Owner INST OF CHEM CHINESE ACAD OF SCI
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