ringtest  determinands seabottom

Marine Sediment Exchange Programmes

Proficiency tests

Participation is open to all laboratories. The type of sample is a selection of open sea sediment, estuarine sediment, harbor sediment and/or river sediment.

Determinand Group Exercise
Metals (e.g. Cu and Zn) MS1
Chlorinated organics (e.g. CB153 and op-DDT) MS2
PAHs (e.g. chrysene and pyrene) MS3
Organotins (e.g. TBT and TPhT) MS6
Brominated Flame Retardants (e.g. BDE28 and a-HBCD) MS7
PFASs (e.g. PFOS and PFOA) MS8
Microplastics DE17

General information

  • Sediment samples cover a wide range of naturally contaminated sandy and silty sediments from open sea, estuaries, rivers an harbor locations.
  • Sediments are dried and milled and sieved to < 0.5 mm.
  • Sediments are packed in glass bottles (metals: 20 gram; others: 50 gram).
  • Dried sediment samples are stable over a number of years when stored at room temperature (except organotins: -20°C).
  • You use your normal validated methods and procedures to analyze 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.


Samples of previous proficiency tests are sold as reference materials. Available materials can be selected and ordered in our webshop. Participants are entitled to a discount.