Holmium oxide solution as a prototype intrinsic standard in molecular absorption spectrophotometry

Details Holmium oxide solution as a prototype intrinsic standard in molecular absorption spectrophotometry Holmium oxide solution as a prototype intrinsic standard in molecular absorption spectrophotometry

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4826..113t&link_type=abstract

Fourth Oxford Conference on Spectroscopy. Edited by Springsteen, Art; Pointer, Michael. Proceedings of the SPIE, Volume 4826,

Computer Science

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Scientific paper

Intrinsic standards can become an efficient mechanism for providing traceable reference materials for chemical spectrophotometry. The sealed holmium oxide (Ho2O3) in dilute acidic aqueous solution used by the U.S. National Institute of Standards and Technology as Standard Reference Material 2034 is a candidate material for an intrinsic wavelength standard in the ultraviolet and visible spectral regions. Low mass fractions of Ho2O3 in glass and as Ho3+(aq) solutions have long been favored for use as wavelength calibration materials in molecular absorption spectrophotometry on the basis of their spectral coverage and absorption band shape. Three national metrology institutes of the North American Cooperation in Metrology evaluated the performance of Ho3+(aq) certified reference materials under "routine" operating conditions using commercial instrumentation. The resulting data show a substantial level of agreement while also demonstrating that the wavelength comparability of the five instruments used by the participants can actually be improved by calibrating all of the instruments to the consensus band locations of Ho3+(aq) solution. A similar approach is being considered to establish intrinsic absorbance standards.

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