Microplasma apparatus suitable for metallic element analysis in gas

A metal element analysis and micro-plasma technology, applied in the field of atomic spectroscopic analysis, can solve the problems of reducing the sensitivity of the element to be measured, restricting the application of the analysis field, and demanding processing requirements, etc., and achieves simple structure, easy miniaturization, and low operating power consumption Effect

Active Publication Date: 2016-06-08
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The sampling method of the liquid cathode glow discharge device is liquid sampling, that is, the liquid sample is introduced into the glass capillary by the peristaltic pump through the sampling tube and overflows. The sampling method is single, and only the liquid sample can be tested; and because the pH value of the cath

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  • Microplasma apparatus suitable for metallic element analysis in gas

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[0034] 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.

[0035] Aiming at various defects existing in traditional metal element analysis devices, the present invention provides a micro-plasma device suitable for metal element analysis in gas, including: a high-voltage power supply, a buffer resistor, a hollow metal anode and a liquid cathode; the hollow The metal anode of the metal anode is connected to the positive pole of the high-voltage power supply through the buffer resistor, and the liquid cathode is connected to the negative pole of the high-voltage power supply through a graphite electrode; the micro plasma device is also formed as the following structure: in the hollow A discharge area is formed between the metal anode and the liquid catho...

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Abstract

The invention relates to a microplasma apparatus suitable for metallic element analysis in gas. The apparatus comprises a high-voltage power supply, a buffer resistor, a hollow metal anode, and a liquid cathode, wherein the hollow metal anode is connected to a positive electrode of the high-voltage power supply through the buffer resistor, and the liquid cathode is connected to a negative electrode of the high-voltage power supply through a graphite electrode. The microplasma apparatus has such a structure that a discharging area is formed between the hollow metal anode and the liquid cathode, and the hollow metal anode is taken as a sampling pipe to enable to-be-detected gas to enter the discharging area and to be excited. The apparatus is simple in structure, small in size, simple to operate, and low in cost. Gas can be directly sampled without affecting stability of microplasma; the metallic element analysis is high in sensitivity; and a base is established for combination of the apparatus and other instruments.

Description

technical field [0001] The invention belongs to the field of atomic spectrum analysis, and relates to a micro-plasma device, more specifically, to a micro-plasma device suitable for analyzing metal elements in gas. Background technique [0002] Traditional metal element analysis methods include atomic absorption spectrometry, inductively coupled plasma emission spectrometry / mass spectrometry, etc. The detection instruments used in these methods are expensive, the equipment is large, the detection steps are cumbersome, and the detection cost is high. With the development of science and technology and the improvement of detection level, people began to study simple, rapid and low-cost rapid detection technology of metal elements. [0003] Micro-plasma is a general term for plasmas with a scale of millimeters or even lower. Micro-discharge plasmas can usually operate under atmospheric pressure conditions, usually do not require special gases for operation, and have the characte...

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Application Information

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IPC IPC(8): G01N21/67H01J49/04H01J49/12
CPCG01N21/67G01N21/69H01J49/0404H01J49/0422H01J49/12
Inventor 汪正黄楚楚李青莫家媚周磊
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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