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The use of certified reference material (CRM) in chemical analyzes is an important requirement in quality assurance systems, since it allows the metrological traceability of results, thus achieving valid and comparable results. This work describes the development and production of holmium oxide reference material that, after certification, will be used in the calibration of the wavelength range of UV-Vis spectrometers and also the necessary feasibility studies to establish the measurement parameters to be used in the next steps of the material production and certification. [ABSTRACT FROM AUTHOR]