Semi-closed system magnetic confinement liquid cathode glow discharge device

A glow discharge and liquid cathode technology, applied in the field of spectral analysis, can solve problems such as process complexity, achieve low cost, convenient operation, and improve analytical performance

Inactive Publication Date: 2021-10-15
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the emission sensitivity of various elements in the microplasma source can be improved by adding chemical sensitizers such as organic substances, inorganic substances, ionic surfactants, and nonionic surfactants to the cathode solution, but these methods are inevitable have to complicate the actual analysis process

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  • Semi-closed system magnetic confinement liquid cathode glow discharge device
  • Semi-closed system magnetic confinement liquid cathode glow discharge device
  • Semi-closed system magnetic confinement liquid cathode glow discharge device

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the drawings and the following embodiments. It should be understood that the drawings and the following embodiments are only used to illustrate the present invention rather than limit the present invention. In each figure, the same or corresponding reference numerals denote the same components, and repeated explanations will be omitted.

[0029] A semi-closed system magnetically confined liquid cathode glow discharge device (hereinafter sometimes referred to as a power generation device) is disclosed. The discharge device includes a semi-closed liquid cathode glow discharge generating chamber (hereinafter sometimes referred to as a discharge generating chamber ) and a magnetic confinement device; a glow discharge occurs in the discharge chamber to generate a particle mixture gas that forms atoms, ions, and electrons, that is, plasma; the magnetic confinement device is located outside the discharge ...

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Abstract

The invention provides a semi-closed system magnetic confinement liquid cathode glow discharge device which comprises a semi-closed liquid cathode glow discharge generation chamber and a magnetic confinement device. The semi-closed liquid cathode glow discharge generation chamber comprises a semi-closed outer cover, a sealed top, a sealed bottom, a high-temperature-resistant capillary tube, a peristaltic pump, a sample injection tube, a waste discharge tube, a graphite rod serving as a cathode and a tungsten rod serving as an anode; the semi-closed outer cover is provided with an observation window, a spectrum detection opening and a graphite rod insertion opening; the sealing top is provided with a top opening, and the tungsten rod is inserted into the semi-closed outer cover from the top opening. The sealed bottom is provided with a first opening and a second opening, the first opening is inserted into a high-temperature-resistant capillary tube which is connected with a sample feeding tube and coaxial with a tungsten rod, and the second opening is inserted into a waste discharge tube; the sample solution is driven by the peristaltic pump to enter the high-temperature-resistant capillary tube, slowly overflows from the top end to be in contact with the graphite rod, glow discharge occurs between the sample solution and the tungsten rod to form plasma, and then the sample solution is discharged from the waste discharge tube; the magnetic confinement device generates a magnetic field confining plasma.

Description

technical field [0001] The invention belongs to the field of spectrum analysis and relates to a semi-closed system magnetic confinement liquid cathode glow discharge device. Background technique [0002] With the rapid development of social economy and modern industry, the content of heavy metals in rivers, lakes, oceans and other water quality is getting higher and higher, and the pollution of heavy metal elements has become increasingly prominent. Because heavy metals are not easy to biodegrade and easy to bioaccumulate in the food chain, which seriously affects people's health and safety, higher requirements are put forward for the micro-trace analysis technology of heavy metals. Liquid cathode glow discharge ion sources have the advantages of low power consumption, no need for compressed gas, no need for nebulizers, and normal operation under atmospheric pressure, etc., and have attracted widespread attention in the field of atomic spectroscopy. [0003] However, the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01
CPCG01N21/3103G01N21/01
Inventor 汪正陈翔宇蔡朝晴
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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