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Liquid negative electrode glow discharge atomizer

A technology of atomizer and glow discharge, which is applied in the field of atomic spectroscopic analysis, can solve problems affecting experimental efficiency, liquid level fluctuations, test signal fluctuations, etc.

Inactive Publication Date: 2014-10-08
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

[0004] In the experiment, when the liquid is discharged through the drain pipe, it will cause fluctuations in the liquid level in the liquid pool, which will affect the stability of the plasma discharge and cause fluctuations in the test signal
Usually before the start of the experiment, it takes a lot of time to stabilize the liquid level, which affects the efficiency of the experiment and is not conducive to online detection in the field

Method used

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  • Liquid negative electrode glow discharge atomizer

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Experimental program
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Embodiment

[0048] figure 1 Schematic diagram of the structure of the liquid cathode glow discharge atomizer claimed for protection in this application. As shown in the figure, power supply 1 adopts BHK2000-0.1MG high-voltage source to provide 0-2000V DC high voltage, and the rated current is 0.1A. The wire from the positive pole of the high voltage source 1 is connected to the tungsten electrode 2 through the protection resistor 7; the negative pole is connected to the graphite rod 3. The sample solution overflows from the sampling tube 5 through the peristaltic pump, and constitutes the entire circuit of the glow device together with the graphite rod 3 and the peripheral circuit. The top of the sampling tube 5 is kept at a distance of 2-4 mm from the tip of the metal anode 2; the electrolyte solution therein can be one of nitric acid, hydrochloric acid, and sulfuric acid, and the pH needs to be adjusted to 1. The designed liquid pool is made of polytetrafluoroethylene material through...

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Abstract

The invention discloses a liquid negative electrode glow discharge atomizer which comprises a metal positive electrode connected with a positive electrode of a high-voltage power supply, a graphite stick connected with a negative electrode of the high-voltage power supply, a liquid cell, a sample injection unit and a waste liquid discharging unit, wherein the graphite stick is fixed on the liquid cell; the sample injection unit comprises a sample injection pipe; the top end of the sample injection pipe is positioned deadly under the lower end of the metal positive electrode; a solution in the sample injection unit escapes from the top end of the sample injection pipe; the liquid discharging unit comprises a liquid discharging pipe; the top end of the liquid discharging pipe and the bottom of the liquid cell are positioned on the same horizontal plane.

Description

technical field [0001] The invention belongs to the technical field of atomic spectrum analysis, and in particular relates to a liquid cathode glow discharge atomizer (light source generation part). Background technique [0002] In the current research, the main structure of the single liquid electrode discharge system is basically the same, including four parts: the light source generation part (ie, the atomizer), the spectroscopic system, the detection device and the data processing system. The atomizer includes a metal anode, a liquid pool, a sampling tube (including a glass capillary) and a drain tube. The liquid sample is introduced into the glass capillary by the peristaltic pump through the sampling tube to overflow, and the overflow part is used as the liquid cathode and the metal anode to generate plasma under the condition of applying high voltage. During the discharge process, the solution in the liquid electrode is continuously vaporized, so that the metal ions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/67
CPCG01N21/67G01N21/69
Inventor 汪正周磊盖荣银杨啸涛
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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