Ultraviolet interferometric spectroscopy for real-time detection of elemental mercury

Xiaomei Tong; Robert B. Barat; Arthur T. Poulos

doi:10.1117/12.417391

13 February 2001 Ultraviolet interferometric spectroscopy for real-time detection of elemental mercury

Xiaomei Tong, Robert B. Barat, Arthur T. Poulos

Proceedings Volume 4201, Optical Methods for Industrial Processes; (2001) https://doi.org/10.1117/12.417391
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

Abstract

12 Mercury emissions from industrial stacks pose a hazardous threat to human being. Conventional methods of atomic absorption and plasma emission spectroscopy have their limitations. In order to develop a sensitive real-time measurement approach for industrial applications, an ultraviolet interferometer system capable of Fourier transform spectrochemical measurements has been preliminary studied in our laboratory. Though interferometry approach is mostly used in infrared, the interferometer we developed has showed its great potential for application in atomic emission detection in ultraviolet. We have set up the interferometer in Michelson configuration. Light source of our choice is low pressure mercury pen lamp which provides strong atomic mercury emissions at 253.7 nm. Fringe patterns at 253.7 nm and 546.1 nm were pictured by a charge-coupled- device camera. Moving fringes was generated by linear displacement of the movable mirror of the Michelson interferometer. The interferograms at both ultraviolet and visible regions of atomic mercury emission spectrum were recorded. Based on the translation function of movable mirror, wavelength information is retrieved from the interferogram. The error of experimental resolved wavelength is within 2%.

Citation Download Citation

Xiaomei Tong, Robert B. Barat, and Arthur T. Poulos "Ultraviolet interferometric spectroscopy for real-time detection of elemental mercury", Proc. SPIE 4201, Optical Methods for Industrial Processes, (13 February 2001); https://doi.org/10.1117/12.417391

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