Care and handling of Certified Reference Materials (RMs)
Only use a dry optical tissue to remove other contamination. Breakage, scratching of the optical faces, or cracking voids the certification. (see MSDS)
Insert and remove cell based Certified Reference Materials from the instrument cell holder using the circular top, and make sure not to place side loads or twist on the cell.
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Glossary:
| Absorbance | Negative logarithm (base 10) of the transmittance. |
| Certified Reference Material | A certified reference material issued by Starna® where the traceability has been established to appropriate NIST Standard Reference Materials (SRMs). |
| Double Aperture | The implicit standard methodology used to calibrate the detector linearity of national reference spectrophotometers. |
| Far UV | Radiation at the shortwave end of the UV region. Generally accepted to be the region between 190 and 250 nm. |
| GLP | Good Laboratory Practice. |
| ISO 9000 | International Standard for quality management and quality assurance. |
| ISO 17025 | International Standard for the accreditation of Testing or Calibration Laboratories, formally ISO/IEC Guide 25. |
| SBW
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Spectral Bandwidth, also known as Spectral slit width (SSW), spectral bandpass, and instrument function; a measure of the monochromaticity of the light of a given spectrophotometer. |
| Transmission | The process by which radiation passes through material. It therefore represents radiation that is not absorbed, scattered or otherwise dispersed by the material. |
| UV-Visible spectrophotometer | An instrument designed to operate through the UV and visible regions, i.e. from 180 to 800 nm. |
ASTM E275-93 Standard Practice for Describing and Measuring Performance of Ultraviolet, Visible, and Near-Infrared Spectrophotometers
ASTM E387-84 Standard Test Method for Estimating Stray Radiant Power Ratio of Spectrophotometers by the Opaque Filter Method
