Holmium Oxide Filter

Newer Dionex UV/photodiode array detectors (including the UVD 170U four-channel detector and the UVD 340U, PDA, PDA-100, and PDA-3000 Photodiode Array Detectors) feature holmium oxide filters.

For the UVD 170U and UVD 340U detectors, the holmium oxide filter is used to calibrate UV/VIS spectra recorded with the detector due to the typical absorption spectrum of holmium oxide.

For the PDA, PDA-100, and PDA-3000 detectors, the holmium oxide filter is used to verify wavelength accuracy.

 Note:

The UVD 170S/340S detectors can be fitted with holmium oxide filters. Please contact Dionex Service for more information.