Certified measurement reference materials used to test the fundamental parameters of analytical UV/VIS absorption spectrophotometers:

  • Resolution or Spectral Bandwidth
  • Stray Radiant Energy (SRE) or Stray Light
  • Wavelength Scale
  • Photometric Scale


An extensive suite of STRANASKA® reference material artifacts has been developed over the years to test the four (4) instrumental parameters specified by USP in accordance with requirements for analytical instrument qualification (AIQ) in FDA-regulated laboratories. Analytical procedures for spectrophotometer AIQ may result in an “under-qualified” condition if all four parameters are not tested. An “under-qualified” AIQ may jeopardize the validity of the calibration sticker affixed to the spectrophotometer which, in turn, may adversely impact laboratory management interpretation and decisions regarding measurement results of the analytical methods run on the instrument.

The suite of STRANASKA® wavelength reference material artifacts are both CRM and CA2M brands. In addition, the solid photometric CA2M reference material artifacts are offered in several product versions of the CAM brand which differ in the scientific metrological rigor of their certification methodologies.

The Stranaska CRM brand is certified using the legacy calibration model (LCM) which most closely mimics the out-dated measurement procedures still used by most competing commercial calibration companies and corporate metrology laboratories. The LCM model reflects simplistic scientific insight and the lowest measurement rigor in the certification process. Therefore, the Stranaska CRM brand is recommended only for use in daily quality control checks, and also for verification or qualification of UV/VIS spectrophotometers classified in the “non-critical” category.

The Stranaska CA2M brand is certified using the advanced calibration model (ACM) which reflects science-based scientific insight and the highest measurement rigor in the certification process. The Stranaska CA2M brand, therefore, is recommended for high-stakes use in science-based qualification of UV/VIS spectrophotometers classified in the “critical” category.

Contact Information

For additional information about our CRM and CA2M artifact standards, please contact Stranaska Scientific today and discuss your UV-VIS spectrophotometer qualification needs with one of our knowledgeable and friendly analytical metrology scientists:

Order Placement and Payment Information

Stranaska’s spectrophotometric measurement standards are acquired by providing valid credit card information (VISA, MasterCard and AMEX) or by issuing an authorized purchase order directly to Stranaska Scientific LLC. The purchase order must clearly include: (i) the product name and number of the measurement standard, (ii) quotation reference order number, and (iii) the correct cost of the measurement standard. The purchase order must also have explicit billing instruction and accounts payable contact information. Internal purchase requisitions are not accepted in lieu of authorized purchase orders. International orders and/or drop shipments may require payment in advance.

Purchase Order Address
Stranaska Scientific LLC
Post Office Box 270334
Fort Collins, Colorado 80527-0334 USA