Proficiency Testing (PT) schemes are operated in many areas of the chemical and biological measurement sectors. There are many PT schemes in these areas, operated by a variety of organisations both within and without the UK. Many PT schemes are international.
The European Commission has recently established a comprehensive on-line database of European PT schemes called 'eptis' (see Links). This database provides detailed information about most European PT schemes, as well as more general information about PT.
If you are trying to select a PT scheme in which to participate, much of the factual information you need can be found on 'eptis'. However, there are a number of questions that need to be asked in order to understand this information fully. EURACHEM have published a document called 'A Guide to the Selection, Use and Interpretation of PT Schemes' which will give appropriate background for your selection criteria. This guide was produced with support from the VAM Programme.