Use of surplus proficiency test items


Factors affecting PT strategyTest items are sometimes available from proficiency testing (PT) providers after the completion of a PT round. The EURACHEM Proficiency Testing Working Group has produced an information leaflet to advise laboratories on benefits and limitations of surplus PT laboratories select the right balance of areas of work and participation frequency. The leaflet is currently available in English. Further translations will be published when available.



Please consult the PT Working Group Chair if you would like to prepare a translation in your own language.


*Publication dates are dates of website publication. English version first published on this site on 2019-11-09.

**Updated 2020-03-18 with editorial correction to footer information only