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Standard reference material 2036 near-infrared reflection wavelength standard
Steven J Choquette1, David L Duewer, Leonard M Hanssen
1Analytical Chemistry Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8394, USA. steven.choquette@nist.gov
Applied Spectroscopy
|May 20, 2005
Summary
Standard Reference Material 2036 (SRM 2036) provides a reliable method for calibrating near-infrared (NIR) spectrometers. This reflection standard offers certified wavelength and wavenumber values for accurate spectral measurements.
Area of Science:
- Spectroscopy
- Materials Science
- Metrology
Background:
- Near-infrared (NIR) spectrometers require accurate wavelength/wavenumber calibration for reliable performance.
- Existing calibration standards may not cover diffuse or trans-reflectance modes effectively.
Purpose of the Study:
- To introduce Standard Reference Material 2036 (SRM 2036) as a certified transfer standard for NIR spectrometers.
- To provide a reliable tool for verifying and calibrating the wavelength/wavenumber scale in reflection modes.
Main Methods:
- SRM 2036 combines rare earth oxide glass with a sintered poly(tetrafluoroethylene) (PTFE) backing.
- This configuration creates reflection-absorption bands with specific reflectance values.
- Certified values for band wavelength centroid locations and vacuum wavenumbers were determined.
Main Results:
- SRM 2036 is certified for seven bands in the NIR region (975 nm to 1946 nm).
- Certified vacuum wavenumber values are provided for these bands (10300 cm⁻¹ to 5130 cm⁻¹).
- Informational values for thirteen additional bands in the UV-Vis-NIR region are also available.
Conclusions:
- SRM 2036 serves as a crucial standard for NIR spectrometer calibration in reflection modes.
- The material offers a robust and accurate method for ensuring spectral scale integrity.
- It supports precise analytical measurements across various scientific and industrial applications.