Stranaska Metrology Laboratory provides science-based measurements on artifact standards used for quality control, daily check, performance evaluation and qualification of analytical UV/VIS absorption spectrophotometers, microplate readers, HPLC absorbance detectors and related spectrophotometric analyzers. The metrology laboratory can accommodate artifact standards in the following dimensional formats:

  • Cuvette [10-mm pathlength]
  • Microplates [96 well]
  • Customer-supplied optics

Stranaska Metrology Laboratory offers several types of measurement services including the following:

  • Recertifications

This is our most common type of measurement service. Our customers return their filter sets to us on a periodic basis so that we can clean the filters and update their certified reference values before returning the filters to field service use. Recertification is preferred over removing a filter set from field service use and replacing it with a new reference standard. Repeated recertification of a filter set over time allow a run chart of the certified values to be established which is important in analytical UV/VIS spectrophotometric metrology.

  • Exit Calibrations

Sometimes, however, it is practical to remove a filter set from field service use. An example may be that the laboratory method has changed and the filter set is no longer appropriate. An exit calibration is critical because it is necessary to complete the calibration cycle for the filter set.

  • Initial Calibrations

This is a growing component of our measurement services. The laboratory may have purchased a 3rd-party measurement standard because of its low price but then realizes that the certification is not science based. For example, the Certificate of Calibration lacks the transparency to substantiate the claim of metrological traceability, and the uncertainty intervals assigned to the “certified” reference values are not current and valid. To salvage the new reference standard, but before placing it into field service use, we certify the new standard with the appropriate scope of calibration using an advanced calibration model.