Test details
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NW 06/2026 - Natural water analyses II

Proftest Syke will organise a proficiency test (PT) for the analysis of chlorophyll a, oxygen, salinity, SiO2, TIC, and TOC in natural waters.
The purpose of this proficiency test is to ensure the comparability and accuracy of the results of the participants. About 30 laboratories are expected to participate in this proficiency test. The measurands and samples of this proficiency test are included in the Water chemistry scheme of the Proftest Syke accreditation (finas.fi/sites/en).
Sample delivery date is 5 May 2026.
The final report for the proficiency test will be published in October 2026.
