Sealed Air Filter Holmium Oxide Glass And Didymium Oxide Glass, Set OPTIRM-HGDG

Starna Scientific - Spectrophotometer UV and Visible Wavelength Qualification
Holmium Oxide and Didymium Oxide Glass Reference Filter Set

Like its liquid counterpart, the holmium glass filter produces characteristic peaks that make it suitable for use as a wavelength reference material in the UV and visible regions of the spectrum (240 nm – 640 nm). Unlike the liquid cell, however, it is not adopted by all the Pharmacopoeias for wavelength qualification. 

It is accepted for this purpose by the following bodies:
United States Pharmacopeia; American Society for Testing and Materials; Therapeutic Goods Administration (Australia); British Pharmacopoeia

The spectrum shows 11 characteristic and well-defined peaks covering the wavelength range from 240 nm to 640 nm. Like its liquid counterpart, the didymium glass filter produces characteristic peaks that make it suitable for use as a wavelength reference material in the visible regions of the spectrum.

A Certificate of Calibration and Traceability and full instructions for use are provided with each Reference Material. The certificate is supplied in electronic format, on a USB drive in the same box as the references, allowing hard copy to be produced on demand and giving easy interface to the user’s own IT systems. Certification measurements are made on a reference spectrophotometer that has been qualified using Standard Reference Materials certified by the National Institute of Standards and Technology (NIST) in the USA, or against primary physical references such as elemental emission lines.