title: Standard reference material 2036 near-infrared reflection wavelength standard.
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.
authors.affiliation: Analytical Chemistry Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8394, USA. steven.choquette@nist.gov
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Choquette
authors.forename: David L
authors.initials: DL
authors.lastname: Duewer
authors.forename: Leonard M
authors.initials: LM
authors.lastname: Hanssen
authors.forename: Edward A
authors.initials: EA
authors.lastname: Early
mesh_terms: D005336:Fiber Optic Technology / Q000295:instrumentation* / Q000592:standards*; D011138:Polytetrafluoroethylene / Q000032:analysis* / Q000737:chemistry / Q000592:standards*; D012015:Reference Standards; D012016:Reference Values; D012031:Refractometry / Q000295:instrumentation / Q000592:standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D017550:Spectroscopy, Fourier Transform Infrared / Q000295:instrumentation* / Q000592:standards*
chemical_list: D011138:Polytetrafluoroethylene