Speciation of Hazardous Inorganic Compounds by Fourier Transform Infrared (FTIR) Spectroscopy

摘要

The report describes an extension of the application of infrared methodology to characterize hazardous inorganic compounds in solid inorganic emissions, based on recent advances in instrumentation for Fourier transform infrared (FTIR) spectroscopy. The improved instrumentation, consisting of multiple-scan computer enhancement methods, has increased the signal-to-noise ratio so that low concentrations on infrared active bands are now measurable. The ability to use spectral subtraction methods, together with improved infrared detectors, also permits trace level infrared analysis; a few years ago, this was not possible. Increasing the infrared spectral scanning range to the far infrared (i.e., down to 100 reciprocal cm) permits characterization of metal-oxygen bending modes. The result of this enhanced technology allows the speciation of hazardous inorganic compounds.