Special excercises
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.
The normal validated methods and procedures of each laboratory should be used to analyse the test materials. Laboratories are requested to fill in method information codes (MIC) for each determinand. This allows laboratories to review the range and similarity of the methodologies used.
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.
| Analyte group | Typical analytes | Excercise |
|---|---|---|
Passive samplers | HCB, HCBD, PCBs, PAHs, brominated flame retardants | |
Microplastics | Total number of particles, Total mass of plastic particles | |
Perfluorinated alkyl substances (PFAS) | PFOS, PFBA, PFPeA, PFHxA, PFHpA, PFOA, PFNA, PFDA, PFUnDA, PFDoA, PFTrDA, PFTeDA, L-PFBS, L-PFHxS, L-PFHpS, PFOSA, PFDS, PFODA, GenX, F-53B, PFBSA, PFHxSA, NMeFOSAA and NEtFOSAA | |
Pharmaceuticals | Diclofenac, Carbamazepine, Ibuprofen, Azithromycin, Clarithromycin and Erythromycin |
- Analyte group
Passive samplers
Typical analytesHCB, HCBD, PCBs, PAHs, brominated flame retardants
Excercise - Analyte group
Microplastics
Typical analytesTotal number of particles, Total mass of plastic particles
Excercise - Analyte group
Perfluorinated alkyl substances (PFAS)
Typical analytesPFOS, PFBA, PFPeA, PFHxA, PFHpA, PFOA, PFNA, PFDA, PFUnDA, PFDoA, PFTrDA, PFTeDA, L-PFBS, L-PFHxS, L-PFHpS, PFOSA, PFDS, PFODA, GenX, F-53B, PFBSA, PFHxSA, NMeFOSAA and NEtFOSAA
Excercise - Analyte group
Pharmaceuticals
Typical analytesDiclofenac, Carbamazepine, Ibuprofen, Azithromycin, Clarithromycin and Erythromycin
Excercise