Substrate enhanced laser-induced breakdown spectroscopy (LIBS) apparatus

摘要

This invention discloses a substrate enhanced laser-induced breakdown spectroscopy (LIBS) apparatus for liquid analysis. The LIBS apparatus comprises a pulsed laser for producing a laser beam, a substrate made of a material having a high absorption coefficient at the laser wavelength for receiving the liquid sample, an optical lens or mirror for focusing the laser beam onto the liquid sample to produce a plasma emission, and a spectrometer for measuring the optical spectrum of the plasma emission. When the thickness of the liquid sample reaches an optimum value, the plasma emission from the liquid sample is enhanced by the substrate to produce a strong LIBS signal for spectral analysis.

主权项

1. A substrate enhanced laser-induced breakdown spectroscopy (LIBS) apparatus for measuring the LIBS spectrum of a liquid sample, the LIBS apparatus comprising:
a pulsed laser light source for producing a laser beam; a substrate made of a material having a high absorption coefficient to the laser beam for receiving the liquid sample; an optical focusing element for focusing the laser beam onto the liquid sample to produce a plasma emission from the liquid sample; a controller for controlling a thickness of the liquid sample on the substrate in such a way that the plasma emission from the liquid sample is enhanced by the substrate; and an optical spectrometer device for measuring an optical spectrum of the plasma emission.