Didymium oxide solution consists of neodymium and praseodymium oxides dissolved in perchloric acid, permanently sealed by heat fusion into a 10 mm far UV quartz cuvette. It is designed as a wavelength calibration standard for spectrophotometers operating in the ultraviolet and visible spectral range from 290 nm to 870 nm.
When used, didymium solution produces a spectral scan with 14 characteristic, well-defined absorption peaks spanning the target wavelength range. Due to the asymmetric nature of the absorption bands, the exact wavelength values depend on spectral bandwidth, and certified values across multiple bandwidths (0.10 nm to 5.00 nm) are provided with each calibration certificate for precise instrument qualification.


Didymium oxide solution consists of neodymium and praseodymium oxides dissolved in perchloric acid, permanently sealed by heat fusion into a 10 mm far UV quartz cuvette. It is designed as a wavelength calibration standard for spectrophotometers operating in the ultraviolet and visible spectral range from 290 nm to 870 nm.
When used, didymium solution produces a spectral scan with 14 characteristic, well-defined absorption peaks spanning the target wavelength range. Due to the asymmetric nature of the absorption bands, the exact wavelength values depend on spectral bandwidth, and certified values across multiple bandwidths (0.10 nm to 5.00 nm) are provided with each calibration certificate for precise instrument qualification.