Measurement methodologies for the calibration of UV/VIS filters vary significantly among commercial calibration companies and corporate metrology laboratories. Consequently, the scientific credibility and defensibility of the accuracy and traceability claims for a filter’s certified values and uncertainties depends greatly on the measurement methodology used in the calibration process.

This is especially important to recognize in highly regulated laboratory applications such as the analytical qualification of UV/VIS spectrophotometers where the deployment of filters “calibrated” using a low-cost methodology of low scientific metrological rigor can be so insidious that it underscores a false sense of compliance security. Unfortunately, because of the lack of full transparency of their certificates or reports of calibration, most corporate metrology and accredited commercial calibration laboratories can cleverly mask the lack of scientific metrological rigor of their calibration process so that it is unknown to the unsuspecting customer.

Stranaska Scientific currently offers two general calibration model classifications for the certification of UV/VIS calibration filters.

Routine Calibration Model [RCM]

The scientific metrological rigor of our basic RCM recertification model is comparable to the low calibration rigor of prevailing metrological industry standard recertifications, especially for USP compliance in analytical instrument qualifications. However, with its unique NIST heritage and UV/VIS measurement science acumen, only Stranaska Scientific has the insightful expertise to know how to integrate value-added science into its RCM methodology to make its lowest-cost CRM standards and recertifications withstand scientific and audit scrutiny.

Stranaska CRM Standards and RCM Recertifications


Advanced Calibration Model [ACM]

Three different versions of our advanced calibration models are recommended to customers that prefer calibration filters used for their spectrophotometer AIQ to be certified beyond typical corporate metrology standards and/or when it is desirable to retain the same calibration rigor relative to the previous certification.
  • ACM-0
  • ACM-1
  • ACM-2