Holmium Oxide Liquid (240-650 nm) - the most widely used reference for wavelength accuracy – accepted by all major Pharmacopoeias
Didymium Oxide Liquid (290-870 nm) – useful peaks in the NIR
Combined Holmium/Didymium Oxide Liquid (240 to 795 nm) – evenly spaced peaks over the range
Holmium Oxide Glass (270-640 nm) – more robust and useful for routine checks
Didymium Glass (430 - 890 nm) – more robust and useful for routine checks
Starna wide-range wavelength reference (335 - 1945 nm) - 20 peaks for wavelength calibration from UV to NIR. NEW!
Deep UV Reference (190-220 nm) – qualification in the deep UV: unique to Starna
Samarium Oxide Liquid (230 – 560 nm) – for the commonly used region from 200 nm to 500 nm