Enabling calibration and testing laboratories to achieve greater confidence in their analyses of the composition gases
NPL organises natural gas and refinery gas proficiency testing (PT) schemes. These PT schemes involve the distribution of accurate natural gas standards of known composition to participating laboratories for 'blind' testing. Participants analyse the mixtures and send their results back to NPL. At the conclusion of the scheme, a report is provided to each laboratory, which includes an anonymous comparison of all participants' results.
'On-demand' proficiency testing schemes
Bilateral, 'on-demand' PT schemes can also be organised. These are available for any gas mixture, and their scope and timing are arranged at the convenience of the participating laboratory. Read details of the operation of these schemes can be found in the procedure document .
Enquire about a proficiency testing scheme
Depending on the demand for such a scheme, we will be able to provide either an on-demand or interlaboratory proficiency testing scheme. Let us know how we can help and an expert will be in touch.
Procedure for an 'on-demand' PT scheme
- NPL prepare and validate a Primary Reference Material (PRM).
- The PRM is sent (without the certificate) to the participating laboratory.
- The external laboratory measures the composition of the PRM and reports their results to NPL.
- NPL provides the external laboratory with a comparison of their results against the gravimetric composition of the mixture, and a certificate showing the composition of the PRM.
- The external laboratory retains the PRM for future use.
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