Authors: Choquette, Steven J.; Duewer, David L.; Hanssen, Leonard M.; Early, Edward A.

Source: Applied Spectroscopy, Volume 59, Issue 4, Pages 84A-94A and 393-544 (April 2005) , pp. 496-504(9)

Publisher: Society for Applied Spectroscopy

Abstract:

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.

Keywords: SRM 2036; STANDARD REFERENCE MATERIAL; WAVELENGTH STANDARD; WAVELENGTH CALIBRATION; REFLECTANCE SPECTROSCOPY; NEAR-INFRARED; DIFFUSE REFLECTANCE; OPTICAL FILTERS

Document Type: Research article

DOI: http://dx.doi.org/10.1366/0003702053641414

Affiliations: 1: Analytical Chemistry Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8394

Publication date: 2005-04-01

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