International Manure and Refuse Sample Exchange Programme - MARSEP

Proficiency tests

Participation is open to all laboratories.

Test programme	Manure and Refuse
Number of rounds	4 per year
Number of samples	4 per round
Sample size	20 g
Origin	Natural source
Exercise name	MARSEP

General information

• The sample types/matrices are chosen to represent the materials which you normally analyse.
• The samples included in this programme are compost, organic fertilizer and sewage sludge.
• The samples are dried, milled and sieved to <0.5 mm.
• The homogeneity of each batch of samples is tested on a selection of parameters.
• The dried samples are stable over a number of years when stored at room temperature.
• You analyze the test materials according to your normal validated methods and procedures 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 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.