Hellma filter base set 667-UV857V3

Filter base set type 667-UV857V3 for checking the spectrophotometer according to USP 857, filter set consisting of 3 glass filters and 8 liquid filters: Check for stray light with acetone (pure, measured against air), spectral range 250 - 330 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 and linearity in the UV range with potassium dichromate filters with concentrations: 20, 60 and 140 mg/l, with the absorptions from 0.1 to 2.0 Abs (UV20/UV60/UV0140) and perchloric acid reference filters (UV14) certified at wavelengths: 235, 257, 313, 350 nm; verification of photometric accuracy and linearity in the Vis range with neutral density glass filters (F2, F4, F203) with the absorptions: 0.25 / 1.0 / 2.0, 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.