This Reference Material can be used to qualify the wavelength calibration, in the ultraviolet and visible regions of the spectrum, of spectrophotometers with spectral bandwidths of 3 nm or less. It is accepted for this purpose by most Pharmacopoeias and Standardisation Bodies, including:

European Pharmacopoeia
Deutsches Arzneibuch (German Pharmacopoeia)
United States Pharmacopoeia
American Society for Testing and Materials
Therapeutic Goods Administration (Australia)
British Pharmacopoeia

This reference comprises Holmium oxide (4% m/v) in 10% v/v perchloric acid, permanently sealed by heat fusion into a 10 mm far UV quartz cuvette.
When prepared in perchloric acid, holmium oxide gives a spectral scan containing a series of 14 characteristic and well-defined peaks covering the wavelength range from 240 to 650 nm*.




Approximate peak wavelength values (in nm) are:
208*, 219*, 233*, 241, 250, 278, 288, 334, 346, 361, 385, 417, 451, 468, 485, 537, 641 (*Available on request)

*For instruments of 1 nm SBW, or less, this range can be extended to 200 nm - 650 nm.



A Certificate of Calibration and Traceability and full instructions for use are provided with each Reference Material. Starna Scientific is accredited to both ISO 17034 (4001) as a Reference Material producer, and ISO 17025 (0659) as a Calibration Laboratory for optical reference measurements. Starna offers a Lifetime Guarantee on all its Reference Materials.