Device for detecting the content of heavy metal Cr element in soil by laser-induced breakdown spectroscopy

Abstract

The invention discloses a device for detecting the content of heavy metal Cr element in soil by laser-induced breakdown spectroscopy, which comprises an electromagnetic valve A, an air inlet tube, a temperature and air pressure sensor, a soil sample carrier, a feed inlet, an air outlet tube, an electromagnetic valve B, a fused quartz lens A, an optical fiber probe, an optical fiber, an optical fiber connector, a closed laser induction chamber, a spectrometer, a fused quartz lens B, a laser head, an ICCD (Intensified Charge Coupled Device) detector, an external connection cable, a femtosecond laser, a bottom shell, a cover plate and a miniature air conditioner. The laser head, the fused quartz lens B and the soil carrier on the femtosecond laser are located on the shame horizontal straight line, the centers of the soil carrier, the fused quartz lens A and the optical fiber probe are located on the same longitudinal straight line, both ends of the optical fibers are connected with the optical fiber probe and the optical fiber connector, and the ICCD detector, the left side of which is connected with the external connection cable, is mounted on the left side of the spectrometer.

Description

technical field [0001] The invention belongs to the field of laser equipment, in particular to a device for detecting the content of heavy metal Cr in soil by laser-induced breakdown spectroscopy. Background technique [0002] With the development of human society, a large number of heavy metal wastes from industrial production and daily life have caused soil heavy metal pollution, and soil heavy metal pollution has become increasingly serious in recent years. The premise of soil heavy metal pollution control is to obtain more accurate information on the degree of soil heavy metal pollution. [0003] Laser-induced breakdown spectroscopy (LIBS) is a rapid and on-site quantitative analysis technology for elemental composition in samples under development. The effective use of laser-induced breakdown spectroscopy (LIBS) can improve the accuracy of soil heavy metal pollution. The accuracy of the information, while the general laser-induced breakdown spectrometer requires a worki...

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Problems solved by technology

[0003] Laser-induced breakdown spectroscopy (LIBS) is a rapid and on-site quantitative analysis technique for elemental composition in samples under development. The effective use of laser-induced breakdown spectroscopy can improve the accuracy of soil heavy metal pollution. The accuracy of the information, while the general laser-induced breakdown spectrometer requires a working environment of 1 standard atmospheric pressure and an ambient temperature of 22°C, which requires an additional set of pressure regulation and temperature regulation devices. The operation is complicated, and the instrument occupies a large space, which is inconvenient Quick check

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