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Ion transmission system for inductively coupled plasma mass spectrometry

An inductive coupling and ion transmission technology, applied in the field of mass spectrometry analysis, can solve the problems of complex structure of ion optical system, low speed and reproducibility, increased maintenance and disassembly, etc., so as to improve ion transmission efficiency, improve sensitivity, and simple structure. Effect

Inactive Publication Date: 2014-03-26
FUDAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The focus of the 90-degree corner is not very stable, the speed and reproducibility are not high, and the structure of the ion optical system of the entire instrument is too complicated, which makes the overall maintenance and disassembly more difficult

Method used

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  • Ion transmission system for inductively coupled plasma mass spectrometry
  • Ion transmission system for inductively coupled plasma mass spectrometry
  • Ion transmission system for inductively coupled plasma mass spectrometry

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Embodiment 1

[0033]As shown in Figures 1 to 3, the novel ion transmission system device of the inductively coupled plasma mass spectrometry (as shown in Figure 1 ) of the present invention has a structure consisting of a sampling cone 101, a skimmer cone 102, an extraction lens 103, an ion deflection electrode 104, Composed of ion focusing lens groups 105-109, the ion deflection electrode 104 is in the shape of a triangular cone as shown in Figure 1(b), a quadrangular cone as shown in Figure 1(c) or a pentagonal cone as shown in Figure 1(d); its 101~ The centers of 109 are all on the coaxial horizontal line, and DC voltage values ​​are respectively applied to 101-109 to form an effective electric potential field, and the sample ions formed in the ICP torch respectively pass through the sampling cone 101, the skimmer cone 102, the extraction lens 103, and the ion The deflection electrode 104 and the ion focusing lens group 105-109 are transmitted to the mass spectrometry detection system, an...

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Abstract

The invention belongs to the technical field of mass spectrographies, and relates to an ion transmission system for an inductively coupled plasma mass spectrometry. The ion transmission system comprises an ion sampling cone, an interception cone, an extraction lens, an ion deflecting electrode and ion focusing lenses, wherein the centers of all the parts are on coaxial horizontal lines; space electric field distribution is generated under a DC voltage; ions deflect, focus and are transmitted under the action of the electric field; photons and neutral particles in a sample are free from the action of the electric field, transmitted linearly, and blocked while meeting the ion deflecting electrode; electrified ions are guided by the electric field, bypass the ion deflecting electrode, and focus into an ion beam under the action of the electric field of the focusing lenses, and then are transmitted to a mass analyzer. The ion transmission system has the advantages that the structure is simple; the use is convenient; interference signals generated due to the entering of the photons and the neutral particles can be removed effectively; the ion transmission efficiency and the sensitivity of the inductively coupled plasma mass spectrometry are improved.

Description

technical field [0001] The invention belongs to the technical field of mass spectrometry, and relates to an inductively coupled plasma mass spectrometry ion transmission system, in particular to a novel ion transmission device and method for inductively coupled plasma mass spectrometry. Background technique [0002] Inductively coupled plasma mass spectrometry (ICP-MS) is an analytical and testing technology developed rapidly in the 1970s. Its principle is to use inductively coupled plasma to ionize the elements contained in the analysis sample into charged ions, and pass through the ion transmission system Charged ions are introduced into the mass analyzer and separated according to different mass-to-charge ratios. After the ion current is amplified by the detector, the measurement and control system processes and gives the analysis results. Compared with other analytical techniques, the ICP-MS has the advantages of low detection limit, wide linear range, rapid and simultan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/06
Inventor 徐福兴丁正知王亮汪源源丁传凡
Owner FUDAN UNIV
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