Standard Reference Material 2036 (SRM 2036) is a certified transfer standard intended for the verification and calibration of the wavelength/wavenumber scale of near-infrared (NIR) spectrometers operating in diffuse or trans-reflectance mode. SRM 2036 Near-Infrared Wavelength/Wavenumber
Reflection Standard is a combination of a rare earth oxide glass of a composition similar to that of SRM 2035 Near-Infrared Transmission Wavelength/Wavenumber Standard and SRM 2065 Ultraviolet–Visible–Near-Infrared Transmission Wavelength/Wavenumber Standard,
but is in physical contact with a piece of sintered poly(tetrafluoroethylene) (PTFE). The combination of glass contacted with a nearly ideal diffusely reflecting backing provides reflection–absorption bands that range from 15% R to 40% R. SRM 2036 is certified for the 10%
band fraction air wavelength centroid location, 10%B, of seven bands spanning the spectral region from 975 nm to 1946 nm. It is also certified for the vacuum wavenumber 10%B of the same seven bands in the spectral region from 10 300 cm−1 to 5130 cm−1
at 8 cm−1 resolution. Informational values are provided for the locations of thirteen additional bands from 334 nm to 804 nm.
Analytical Chemistry Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8394
Publication date: April 1, 2005
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