Starna Cuvettes, Lenses & Optics
For Scientific applications
Care and handling of Certified Reference Materials (RMs)
Always store the reference(s) in the box when not in use. Handle with extreme care, like any fragile component. Remove dust from the optical faces by blowing dry air on to the surface. (see MSDS)
Only use a dry optical tissue to remove other contamination. Breakage, scratching of the optical faces, or cracking voids the certification.
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.
References 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
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.
Standards:
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
