Special excercises

Proficiency tests

For emerging pollutants/determinands or in case of poor comparability among laboratories analytical methodology may need to be refined. On request WEPAL-QUASIMEME offers development exercises to develop and improve the methodology, that may result in a new proficiency test scheme on a regular base.

Workshops that focus on specific problems and to discuss achievements or corrective actions can be part of these development exercises.

Participation is open to all laboratories worldwide, however, some determinands are only suitable for local laboratories as analysis needs to be performed on fresh samples. Preservation of samples is not applicable for all types of determinands.

General information

• Samples are mainly prepared from local Dutch sources.
• The preserved samples are stable for the period of the test when stored properly.
• All samples are prepared in bulk and tested for its homogeneity where relevant.
• Use your normal validated methods and procedures to analyse the test materials.
• New determinands can be added to these programs on request.
• Reports contain all data reported under strict confidentiality, including Z-score plots and method information of methods used.

Determinands

The list below shows typical determinands for the development excercises.

Reference materials

Samples of previous proficiency tests are sold as reference materials. Available materials can be selected and ordered in our webshop. In our webshop it is also possible to request a quotation. Participants of our proficiency tests are entitled to a discount.