The SoHT organises twice a year proficiency tests (PT) for drug of abuse (DoA) and ethyl glucuronide (EtG). The participation is exclusively reserved for SoHT members. The registration is possible via the SoHT homepage in March/April and by the registration form which is sent by email to every SoHT member.

The PT samples will be shipped around May/Jun for the 1st and Oct/Nov for the 2nd round. The cost for the DoA and the EtG is 200 Euro each for two rounds.