A high-temperature optical cell for chemical analysis of vapor using combined spectroscopy approaches

Abstract

This paper introduces a novel optical cell design that integrates ultraviolet-visible (UV-vis) and laser-induced breakdown spectroscopy (LIBS) for comprehensive vapor phase chemical analysis at temperatures up to 450 °C. The motivation behind this research is to overcome the limitations of existing vapor phase spectroscopy techniques by providing a versatile and efficient solution for detailed chemical analysis in high-temperature environments. The modular design of the optical cell enables the optimization of optical path length and beam diameter to meet the specific requirements of each spectroscopy technique. Experimental results demonstrated good resolution when analyzing both organic (naphthalene) and inorganic (SbCl₅) vapors. A key innovation discussed is the implementation of a cover gas buffer to prevent material buildup on the optical windows, ensuring the integrity and longevity of the cell during extended operation. This approach enhances the capabilities of existing techniques and extends their applicability to various scientific and industrial applications, including environmental monitoring, pharmaceuticals, materials science, and chemical manufacturing.