A laser-induced elemental analysis device

Abstract

The invention provides a laser induction element analysis device. The laser induction element analysis device comprises an initial simulating pulse laser device, re-simulating pulse laser devices, a signal receiving unit, a data analyzing unit and a control unit. The laser induction element analysis device is characterized by further comprising a hollow spherical restriction device; the spherical restriction device is internally and vertically provided with a supporting rod; the height of the supporting rod is adjustable; a pulse laser beam transmitted by the initial simulating pulse laser device can be vertically transmitted into the central position of the upper surface of a sample to be detected; the plurality of sets of re-simulating pulse laser devices are arranged; all the re-simulating pulse laser devices are uniformly distributed at intervals along the peripheral direction; pulse laser beams transmitted by all the re-simulating pulse laser devices are located on the same horizontal plane of the upper surface of the sample to be detected and are horizontally transmitted into the central position of the upper surface of the sample to be detected so as to uniformly carry out resonance oscillation and re-stimulation on plasmas in the space. The laser induction element analysis device has the strong plasma spectral signal strength, the low element detection limit and the high detection sensitivity.

Description

Technical field: [0001] The invention relates to an elemental analysis device, in particular to a laser-induced elemental analysis device for solid samples to be tested. Background technique: [0002] Laser-induced breakdown spectroscopy (LIBS for short) is an emerging atomic emission spectroscopy analysis technology, which focuses a pulsed laser beam on the surface of the sample, vaporizes, ionizes, and excites trace substances on the surface of the sample to form a high-temperature plasma. The element spectrum emitted by the plasma is collected through the optical system, and coupled to the spectrometer through the optical fiber; the spectrometer then transmits the spectral data to the computer for processing. LIBS technology has the characteristics of fast, real-time, no sample preparation, micro-loss, multi-element simultaneous analysis, etc. At present, LIBS technology has a wide range of applications, including traditional chemical analysis, environmental monitoring, ...

AI Technical Summary

Problems solved by technology

However, the double-pulse technology has the disadvantage that the plasma cannot be fully uniformly excited in space, and the particles in the plasma cannot be fully impacted and compressed.

In addition, the simple double-pulse technology lacks a mechanical confinement device, and the plasma is easy to escape outwards, which cannot form a resonance enhancement effect, and the enhancement effect of the plasma radiation spectrum signal is not ideal.

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