Allow the performance and accuracy of spectrophotometers to be confirmed at regular intervals in compliance with Good Laboratory Practice (GLP) or ISO9000 to ISO9004 specifications.
- Accuracy can be checked with respect to:
- — Absorbance in the Visible range at 440nm, 465nm, 546nm, 590nm and 635nm wavelengths
- — Wavelength in the UV and visible range at 279.3nm, 360.9nm, 453.5nm, 536.3nm and 637.6nm
The set comprises four secondary calibration standard filters, housed in precision aluminium mounts designed for use with standard 10mm path length cell holders supplied with most spectrophotometers. An empty mount is also supplied. Three filters are grey glass, specially selected for homogeneity, stability and their generally uniform transmission values within the visible spectrum range. The fourth filter is made of silica doped with holmium oxide which exhibits a number of sharp absorption peaks throughout the UV, visible and NIR spectral ranges. The exact positions of these peaks vary slightly from production batch to batch therefore each filter is individually calibrated. Spectrophotometer Calibration Standards
Supplied in a plastic box with certificate traceable to a primary standards set ratified by NIST, USA (National Institute of Standards and Technology). Each filter has dimensions 45 x 12.5 x 12.5mm H x W x D.
Individual filters and filter re-calibration are available – details on request.