fresh water  sediment quality assurance

Sediment Exchange for Tests on Organic Contaminants - SETOC

Proficiency tests

Participation is open to all laboratories.


Test programme Fresh Water Sediment
Number of rounds 4 per year
Number of samples 4 per round
Sample size 100 g
Origin Natural source
Exercise name SETOC

General information

  • The sample types/matrices are chosen to represent the materials which you normally analyse. There is no spiking or use of artificial samples.
  • The samples are obtained from river beds, lake bottoms and harbours.
  • Sediments are dried and milled and sieved to < 0.5 mm.
  • The homogeneity of each batch of samples is tested on a selection of parameters.
  • The dried sediment samples have been are stable over a number of years when stored at room temperature.
  • You analyze the samples according to your own procedures and for those elements and parameters you are interested in. ·Your results are processed at WEPAL-QUASIMEME and published every three months under confidential code names.
  • The reports contain all data, statistical evaluation including Z-score plots and method information about the method used.
  • Your reports are available within three weeks after the submission deadline
  • New determinands can be added on request.

Determinands and analysis

Polycyclic Aromatic Hydrocarbons

Determinand group

  • Polycyclic aromatic hydrocarbons

Click here for more detailed information about the determinands and the scope of accreditation.

Halogenated Organics

Determinand group

  • Polychlorobiphenyls
  • Organochlorine pesticides
  • Dibenzo-P Dioxin**
  • Dibenzofuran**

** Dioxins and Furans only once a year

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Major and Trace Elements

Deteminands groep

  • Metals

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Brominated Flame Retardants

Deteminands groep

  • Brominated Flame Retarders

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Others and Experimental

Determinand group

  • Other parameters (CN fractions, organic and inorganic C, halogeneted hydrocarbons, mineral oil)
  • Experimental

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Webshop

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