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The success of many FT-NIR analyses is often limited by the wavelength accuracy of the instrument. The objective of this work was to determine the wavelength stability of AntarisTM FT-NIR analyzers over time and to evaluate the wavelength accuracy between several systems. Spectra were acquired from atmospheric water vapor, NIST SRM 2035 glass and a polystyrene reference mounted in the validation wheel of the instrument. The effects of the resolution and beam path optics line shapes were also evaluated.
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