Hellma Filter Base Set UV857V2

Basic filter set type 667-UV857V2 for checking the spectrophotometer according to USP 857, filter set consisting of 3 glass filters and 7 liquid filters: Check for stray light with sodium nitrite in H20 with layer thickness 10 mm (UV11) and reference filter sodium nitrite in H2O with layer thickness 5 mm (UV11H), cut-off at 385 nm; check for wavelength accuracy with holmium in perchloric acid (UV5) certified at wavelengths: 241, 250, 278, 287, 333, 345, 361, 385, 416, 452, 468, 485, 536, 640 nm; verification of resolving power with toluene in hexane (UV6) and reference filter hexane (UV9) certified in the wavelength range: 265 - 270 nm; verification of photometric accuracy in the UV range with potassium dichromate 60 mg/l in perchloric acid (UV60) and perchloric acid reference filter (UV14) certified at wavelengths: 235, 257, 313, 350 nm; verification of photometric accuracy in the Vis range with neutral density glass filters (F2, F3, F4) with absorbances: 0.25 / 0.5 / 1.0, certified at the wavelengths: 440; 465; 546.1; 590; 635 nm, filter set in high-quality storage box with DAkkS calibration certificates and and Hellma Analytics calibration certificate Attention: article until 30.06.2022 available. Further information will follow.