Trace element detection device based on plasma surface wave excitation

Abstract

The invention provides a trace element detection device based on plasma surface wave excitation and belongs to the field of trace element detection. The trace element detection device comprises a plasma excitation source generation system, an atomization system, a spectrum detection system and a cooling system. Working gas is injected from the upstream of a discharge tube, an energy coupling area of a surface wave plasma exciter generates plasma, and the generated surface wave plasma can extend to an outlet end of the discharge tube; a to-be-detected liquid sample after being treated by a pneumatic atomizing device forms a gaseous-phase sample, the gaseous-phase sample is led into the surface wave plasma by a lead-in port through a quartz lead-in tube, elements in the to-be-detected sample are excited by the surface wave plasma to generate feature spectra which are received by an optical fiber probe at an observation window for spectrum detection and transmitted to a spectrograph, and a computer analyzes feature excitation lines of the to-be-detected sample to realize qualitative and quantitative analysis of to-be-detected trace elements in the to-be-detected sample. The trace element detection device can improve bearing capacity of microwave plasma to the gaseous-phase sample and is simple in structure and convenient to operate.

Description

technical field [0001] The invention belongs to the field of trace element detection, and relates to a spectrometer for detecting trace amounts of heavy metal or non-metal components in a sample, in particular to an atomic emission spectrometer using surface wave plasma as an excitation source. Background technique [0002] In recent years, pollution incidents related to heavy metals and non-metals are frequent, and the pollution is quite serious, which is very harmful to the environment and organisms. Heavy metals can be enriched through the food chain and enter the human body. The damage to human organs is irreversible, resulting in death. Non-metal pollution also causes great harm to the human body, and can even lead to death in severe cases. The sources of these pollutions are extremely extensive, involving all walks of life, mainly including industrial pollution sources such as metal smelting, combustion, batteries, mechanical processing, and chemical synthesis, agricul...

AI Technical Summary

Problems solved by technology

The invention can not only solve the defects that the inductively coupled plasma spectrometer is difficult to detect non-metallic elements and high maintenance costs, but also can solve the problems that the microwave plasma has too low a sample tolerance and the discharge tube is easy to heat and damage under high power, and the instrument system simple and easy to operate

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