Low-cost and high-sensitivity laser probe element analyzer

Abstract

The invention discloses a low-cost and high-sensitivity laser probe element analyzer. The laser probe element analyzer comprises a pulsed laser, a beam splitter, a laser energy meter probe, a digital delay pulse generator, a data acquisition card, a laser energy meter, a computer, a first convergent lens and a photomultiplier; the first convergent lens is located on the reflecting optical path of the beam splitter; a plasma signal acquisition optical system is used for acquiring laser plasma signals on one side of a detected object in the horizontal direction and comprises a second convergent lens, an adjustable slit, a third convergent lens, a narrow band filter and a fourth convergent lens which are sequentially arranged, the width of the adjustable slit can be continuously adjusted within the range from 0 mm to 10 mm, and the adjustable slit is used for conducting spatial selection on plasma emission optical signals; a light inlet of the photomultiplier is located at the focus of the fourth convergent lens. The low-cost and high-sensitivity laser probe element analyzer is especially suitable for on-line detection on substance components, has the advantages of being low in cost and high in detection sensitivity and detection speed and has a wide application prospect and market.

Description

technical field [0001] The invention relates to the field of spectral analysis and analytical chemistry, in particular to a low-cost and high-sensitivity laser probe element analyzer, which is especially suitable for on-line detection of material components, and has the characteristics of low cost, high detection sensitivity, and fast detection speed. It has broad application prospects and markets. Background technique [0002] With the advancement of science and technology and economic development, people's living standards have been continuously improved, but some prominent social problems have also emerged. For example, food safety issues and environmental pollution issues that have been continuously exposed in recent years have seriously threatened people's lives and health. At present, there is an urgent need for accurate and reliable detection methods to effectively monitor the environment and food quality, so as to ensure the safety of people's lives. In addition, in...

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Problems solved by technology

[0004] Although the laser probe technology has many advantages in the analysis of material components, the technology has not been well promoted and popularized at present. One of the very important reasons is that the production and manufacturing costs of this analyzer are too high. Under the condition of detection effect, the cost of this analyzer is much higher than that of other mainstream analytical instruments, which restricts the application and promotion of laser probe analysis technology to a certain extent

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