Holmium Oxide in Perchloric Acid

4% Holmium Oxide in Perchloric Acid in a 10mm Sealed Cuvette
 
This solution is used to confirm that the accuracy of the wavelength axis over the intended operational range is correct within accecptable limits. 
 
Certified Wavelengths: 241, 250, 278, 287, 333, 345, 361, 386, 416, 451, 468, 485, 536, 640 nm