A new Certified Reference Material from Starna gives 14 well-defined, evenly spaced and proven interference-free peaks for spectrophotometer wavelength qualification covering a wavelength range from 240 nm to 795 nm. Rare earth oxide solutions have been used for wavelength calibration for many years and are accepted for this purpose by all the pharmacopoeias. This reference combines holmium and didymium (neodymium and praseodymium) and covers the most popular wavelengths in UV and visible spectrophotometry. Because peak values measured on sharp peaks are wavelength dependent, the Calibration Certificate accompanying each reference gives actual values measured at nine different bandwidths from 0.1 nm to 5 nm, covering most operating situations. Certified values are all fully traceable to NIST, and Starna is accredited to both ISO Guide 34 as a Reference Material producer and ISO 17025 (0659) as a Calibration Laboratory. Like all Starna reference materials, this reference carries a lifetime guarantee.
