It’s time for the interlaboratory proficiency test 2022. The test material was shipped on 4 October 2022. NRL's can follow the transport through the link send directly to them by e-mail.
Deadline for submitting results is 18 December 2022.
Below, you'll find the letters containing information for PT 1 and PT 2 (also present in each parcel), the spreadsheet to provide results and instructions on how to fill it in.
Documents for carrying out the tests