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Internal diagnostics for FT-IR spectrometry

A FT-IR spectrometer thermal stability, responsivity and self emission was evaluated under controlled laboratory conditions. Internal diagnostics provided by the FT-IR spectrometer design insured the acquisition of accurate and precise spectral data. Absorbance measurements performed using the spectrometer agreed to within 3% of the literature values. The internal polystyrene film permitted a reliable assessment of the wavenumber axis registration which is critical in the identification of target analyte spectral features.