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Uniform substance based laser induced breakdown spectroscopy correction method

A laser-induced breakdown and uniform technology, used in thermal excitation analysis, material excitation analysis, material analysis by optical means, etc., can solve the problems of high labor cost, low dust removal efficiency, easy damage to the atomized mirror, etc. Maintenance cycle, the effect of reducing the number of times of use

Active Publication Date: 2017-03-29
山西祎恒光电科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high labor cost, low dust removal efficiency and easy damage in the optical dust prevention method of laser induced breakdown spectrum correction using manual cleaning method, electrostatic dust removal method, positive pressure protection method, water spray or atomization wiping method, etc. or poor technical problems such as atomized mirror surface and poor dust removal effect, a laser-induced breakdown spectrum correction method based on homogeneous substances is provided

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  • Uniform substance based laser induced breakdown spectroscopy correction method
  • Uniform substance based laser induced breakdown spectroscopy correction method
  • Uniform substance based laser induced breakdown spectroscopy correction method

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Embodiment Construction

[0018] In this embodiment, cement is used as the sample to be tested to specifically introduce a laser-induced breakdown spectrum correction method based on a uniform substance of the present invention, which includes the following steps:

[0019] (a) Select a uniform substance with hard texture, ablation resistance on the surface, uniform distribution, consistent inside and outside; because 6061 aluminum alloy is hard, ablation resistant, uniformly distributed, consistent inside and outside, and RSD between groups is small, choose it as a uniform substance Meet the relevant selection requirements. figure 1 Shows the calculated value of the RSD between the 45 spectral lines in the plasma spectrum of the aluminum alloy 1800 group, and the variation range is 0.4 to 1.8%;

[0020] (b) After weighing five clean lenses of the same kind, use a blower to raise the dust and evenly scatter them on the surface of the lenses to allow them to receive different degrees of pollution. After weighi...

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Abstract

The invention belongs to the technical fields of spectral analysis and detection method, and specifically relates to a uniform substance based laser induced breakdown spectroscopy correction method. Because the environment of an industrial site is bad and there are many dusts, the optical elements (especially the optical transceiving windows contacted with the external environment) of an optical detection system used in a laser induced breakdown spectroscopy technology (LIBS) are easily polluted by the dusts; the excitation light power and fluorescence collection efficiency are reduced, and thus the error of the detection results is large. According to the method, the plasma spectroscopy of a uniform substance is used to correct the element characteristic emission lines in the plasma spectroscopy of a sample so as to inverse the strength of element characteristic emission lines under a pollution-free situation, and thus the influence of dusts on the measurement precision of LIBS can be effectively corrected. By combining the provided correction method and a conventional optical dustproof method, the maintenance period of LIBS detection equipment is largely prolonged.

Description

Technical field [0001] The invention belongs to the technical field of spectral analysis and detection methods, and specifically relates to a laser-induced breakdown spectrum correction method based on a homogeneous substance. Background technique [0002] Laser-induced breakdown spectroscopy is a brand-new material element analysis method. It has the advantages of fast analysis speed, easy installation, no sample pretreatment and simultaneous analysis of multiple elements. It is very suitable for industrial online detection. However, due to the harsh industrial site environment and more dust, the optical components inside the laser-induced breakdown spectroscopy (LIBS) optical detection system, especially the optical transceiver window in contact with the external environment, are very susceptible to dust pollution, thereby reducing excitation The optical power and fluorescence collection efficiency change the collected spectrum, which ultimately leads to larger errors in the de...

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Application Information

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IPC IPC(8): G01N21/71
CPCG01N21/718
Inventor 赵洋张雷尹王保肖连团贾锁堂
Owner 山西祎恒光电科技有限公司
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