Aug 2004International Crystal LaboratoriesRequest Info
Polystyrene calibration films for FTIR spectrophotometers are available from International Crystal Laboratories. They come with a 38-µm pathlength or in sets of two pathlengths for more precise calibration. Traceable to NIST 1921, the films come freestanding or, to prevent fringing, deposited on KBr windows either undoped or doped with boron. They are radially symmetric, eliminating orientation effects of extruded films.