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Device and method for enhancing radio frequency glow discharge mass spectrum ion signal intensity through annular magnetic field

A technology of radio frequency glow discharge and signal strength, which is applied in the direction of electron/ion optical device, particle separator tube parts, magnetic declination of separation tube, etc., can solve the problem of low signal strength, achieve high signal strength, improve The effect that performance and structure are simple

Inactive Publication Date: 2018-10-02
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a radio frequency glow discharge mass spectrometer to analyze non-conductive material signal enhancement device and method, to solve the problem of low signal strength of the existing radio frequency glow discharge mass spectrometer

Method used

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  • Device and method for enhancing radio frequency glow discharge mass spectrum ion signal intensity through annular magnetic field
  • Device and method for enhancing radio frequency glow discharge mass spectrum ion signal intensity through annular magnetic field
  • Device and method for enhancing radio frequency glow discharge mass spectrum ion signal intensity through annular magnetic field

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Under normal temperature and pressure, the metal material is processed into a hollow cylindrical shell 1 (take brass material and hollow cylindrical shape as an example), and the internal dimensions of the copper shell are: outer diameter 30.5 mm, inner hole radius 20.5 mm, height 5 mm, Metal shell with a thickness of 0.5mm.

[0059] The ring magnet 4 is made of NdFeB material, the magnet model is N35, the coercive force is 876kA / m, the magnetic permeability is 1.05, the outer diameter of the magnet is 29 mm, the inner diameter is 19 mm, the height is 4.5 mm, and the magnetization direction is radial. Magnetism, forming a ring-shaped magnetic field enhancement part.

[0060] When in use, combine the ring-shaped magnetic field enhancement part with the sample and put it into the sheet-shaped sampling device. After the RF power is turned on, the current is conducted to the sample through the sampling rod and the shell, and the device forms a magnetic field on the side of ...

Embodiment 2

[0063] The present invention will be further described below through another embodiment. In the following examples, the signal intensities of typical elements detected by radio frequency glow discharge mass spectrometers with and without magnetic field enhancement parts are compared, and the greater the difference between the two, the better the signal enhancement effect; Deviation (RSD %) indicates the discharge stability of the new device for analyzing non-conductive samples, and the smaller the value, the better the stability.

[0064] Pristine yttrium oxide (Y 2 o 3 ), Bi 12 SiO 20 (BSO) and Ba 5.52 La 0.32 Ti 2 Nb 8 o 30 (BTN) material is processed into a disc-shaped sample, the size is: cross-sectional diameter 20 mm, thickness 2 mm; nitric acid (HNO 3 ), ultrapure water and ethanol, and dried. Subsequently, the sample was analyzed by rf-GD-MS under the conditions of RF source power: 30W, discharge gas (Ar) flow rate: 1.1 cc / min. Y 2 o 3 Y in BSO, Bi in BS...

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Abstract

The objective of the invention is to provide a device and a method for enhancing radio frequency glow discharge mass spectrum ion signal intensity through an annular magnetic field, and aims at solving the problem of low radio frequency glow discharge mass spectrum signal intensity at present. The device comprises a sample feeding device which is provided with a sample feeding rod and fixed ceramic gaskets; and an annular magnet enhancement part which is provided with a shell and an annular magnet, wherein the annular magnet is put in the shell, and the annular magnet enhancement part is fixedbetween the sample feeding rod and the ceramic gaskets in the sample feeding device.

Description

technical field [0001] The invention belongs to the technical field of inorganic mass spectrometry. Specifically, the present invention relates to the field of analyzing materials by a radio frequency glow discharge mass spectrometer, and more specifically, relates to a device and a method for enhancing ion signal intensity of a radio frequency glow discharge mass spectrometer by using a circular magnetic field. Background technique [0002] Glow discharge mass spectrometry (GD-MS) is a direct analysis method for solid samples. It has the characteristics of direct solid sample injection, high sensitivity, small matrix effect, and one-time analysis of more than 70 elements. It is widely used in high-purity conductor materials. trace element analysis. With the increasing requirements for elemental analysis of non-conductive materials, radio frequency glow discharge mass spectrometry has gradually attracted people's attention. In the radio frequency mode, charged particles mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/04H01J49/06H01J49/20
Inventor 钱荣卓尚军董疆丽王群
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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