It’s time for the interlaboratory proficiency test (PT) 2025. The test material will be shipped on 22nd September 2025.
Deadline for submitting results is the 8th December 2025.
Documents for carrying out the tests
Below, you'll find the letters containing information for PT 1 and PT 2 (also present in each parcel) as well as the spreadsheet for the results including instructions on how to fill it in.