Analysis system and method of laser-induced breakdown spectroscopy

Abstract

The present invention provides a two-dimensional energy-dependent laser-induced breakdown spectrum analysis system and method. The system includes: a laser, a spectrometer, a delay generator, an optical fiber, a sample, and a computer; the laser is used to periodically emitting pulsed laser light and hitting the sample; the delay generator is respectively connected to the laser and the spectrometer, and is used to trigger the acquisition signal of the spectrometer according to a preset delay time; the The spectrometer is respectively connected with the optical fiber and the computer, and is used to collect the plasma optical signal emitted by the sample through the optical fiber. The present invention provides an analysis system and method based on two-dimensional energy-related laser-induced breakdown spectrum, which expands the conventional laser-induced breakdown spectrum on the laser energy scale, so as to analyze the spectral features more clearly and improve the conventional laser-induced breakdown spectrum. Detectability and repeatability of induced breakdown spectroscopy methods.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to an analysis system and method for laser-induced breakdown spectroscopy. Background technique [0002] Laser-induced breakdown spectroscopy is a new type of spectral detection method. Its principle is to irradiate the sample with a strong laser to excite it into a plasma state, and then use a spectrometer to collect the emission spectrum of the plasma state to analyze the element content in the sample. In recent years, laser-induced breakdown spectroscopy has been applied to the measurement of trace elements in samples such as steel, coal powder, murals, soil, and wood. [0003] At present, because the laser-induced breakdown spectroscopy needs to break down the sample to obtain the plasma state spectrum in the measurement, under the influence of laser energy jitter, sample surface inhomogeneity, plasma plume diffusion instability, etc., laser-induced breakdown spectr...

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Problems solved by technology

[0004] However, these methods can improve measurement repeatability, but not by much

In addition, another problem of laser-induced breakdown spectroscopy is that its detection ability is not high. On the one hand, some weaker energy transition lines of elements are not easy to be identified; overlapping together, resulting in recognition errors

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