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 one month after the submission deadline
• New determinands can be added on request.

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.