Reference materials

Samples from the Proficiency test schemes are available as reference material, which can be used for method development or as reference samples for internal quality control. The reference materials are delivered with a certificate of analysis or summary statistics. These documents are based on results from the WEPAL-QUASIMEME PT schemes. The certificates provide information about:

  • the consensus value: the mean value of the dataset obtained from the PT, calculated with robust statistics
  • the standard deviation and coefficient of variation
  • number of results used to calculate the consensus value
  • median and MAD (Median of Absolute Deviation)

Overview reference materials and how to order

More information in the WEPAL-QUASIMEME webshop.


Fees depend on your choice. Participants of the WEPAL programmes are entitled to a discount.