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The Joint Research Centre (JRC) is the European Commission's science and knowledge service which employs scientists to carry out research in order to provide independent scientific advice and support to EU policy.
The EURL-HM-20 proficiency test (PT) focuses on the determination of the mass fraction of total arsenic, cadmium, lead, mercury and inorganic arsenic in chocolate. This PT is organised in support to Commission Regulation (EC) No 1881/2006 setting maximum levels for certain contaminants in foodstuffs.
The main objective of this exercise is to assess the analytical capabilities of nominated National Reference Laboratories (NRLs), food official control laboratories and other interested laboratories in the determination of heavy metals in chocolate.
Participation in EURL-HM-20 is mandatory for all NRLs having experience in this kind of analysis.
Test item and analytes
The test item to be analysed is chocolate. Each participant will receive one test item. The measurands are total As, Cd, Pb, Hg and iAs in chocolate.
General outline of the exercise
Participants are requested to perform one to three independent analyses using the method of their choice, and to report the mean of their measurement results, the associated expanded measurement uncertainty and coverage factor k.
Detailed instructions will be sent together with the test item.