Matrix-assisted excitation spectrum detection system adopting plasma surface sample injection

Abstract

The invention discloses a matrix-assisted excitation spectrum detection system adopting plasma surface sample injection. The matrix-assisted excitation spectrum detection system adopting plasma surface sample injection comprises a carrier gas system, a microwave source system, a sample injection system, a microwave induced plasma excitation source, a detection system for carrying out collection, transmission, beam splitting and detection on the detection light emitted by the microwave induced plasma excitation source, and a data processing system for carrying out analysis processing on the output signal of the detection signal, wherein the carrier gas system is connected with the gas discharge tube inlet of the microwave induced plasma excitation source, the signal input end of the data processing system is connected with the signal output end of the detection system; the microwave induced plasma excitation source is connected with the microwave source system through a microwave transmission line. According to the matrix-assisted excitation spectrum detection system adopting plasma surface sample injection, disclosed by the invention, elemental analysis is carried out in a manner of surface sample injection; the system is miniaturized in composition, good in production stability, high in sensitivity, simple in device, simple and convenient to operate, low in sample consumption, high in analysis speed, low in energy consumption, and low in gas consumption.

Description

technical field [0001] The invention relates to the field of spectrum analysis, in particular to a plasma surface sampling excitation spectrum detection system. Background technique [0002] In plasma atomic spectrometry, the way of sample introduction is often regarded as its Achilles' heel. The development and improvement of sampling systems has become one of the major research challenges for scientists in this field. The traditional pneumatic nebulizer (Pneumatic Nebulization, PN) is the most commonly used liquid sample injector in current atomic spectroscopic analysis because of its simple structure and working principle. However, traditional pneumatic nebulizers have many drawbacks, such as low nebulization efficiency (<5%), large sample consumption (1-2 mL), and severe matrix interference. These shortcomings reduce the sensitivity of the method and limit its application in the detection of samples with small volume and complex matrix. Due to these shortcomings of...

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Problems solved by technology

However, the energy and temperature of ordinary plasma jets often cannot meet the energy requirements of atomic emission.

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