Report of the Results of SIM.QM-P6: UV/Visible Spectrophotometry Wavelength Standard Interlaboratory Comparison

摘要

A study was designed to compare wavelength axis measurements in ultraviolet and visible (uv/vis) spectrometry at several laboratories of the InterAmerican Metrology System (Sistema InterAmericano de Metrologia, or SIM) using holmium oxide solution Certified Reference Materials (CRMs). The goals of the study were to demonstrate comparability of wavelength measurements among the participants, to demonstrate the comparability between National Institute of Standards and Technology (NIST) and Centro Nacional de Metrologia (CENAM) versions of holmium oxide in perchloric acid solution CRMs, to acquire holmium oxide solution spectral data from a variety of spectrometers for use in a NIST study of wavelength assignment algorithms, and to provide a basis for a possible reassessment of the NIST-certified wavelength values. The goals were generally met, with widespread agreement of the measurements, evidence that sample origin is irrelevant, and support for re-assignment of the NIST-certified wavelength values for absorption band positions in SRM 2034.