The Polystyrene wavelength standard™ is a certified wavenumber for calibration purposes, it is made of polystyrene film. It can be used to meet the requirements of FTIR – Mid IR and the wavenumber ranges from 545 cm-1 to 3082 cm-1 (14 peaks). There are two versions, one for ATR in the Mid-IR and the other for NIR region which have additional certified peaks.
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