20.500.12556/DiRROS-23501 Achieving measurement comparability in mercury speciation analysis in seawater Key requirements and best practices The comparability of measurement results is an important issue in contemporary mercury (Hg) speciation in seawater. Sampling campaigns must be properly designed to determine significant differences on spatial and temporal scales, considering two major parameters: the variability of expected data at a given sampling point/ transect and variability in the results due to the intrinsic properties of specific analytical methods, particularly the measurement uncertainty. This study assessed the required sample size, considering several aspects of data variability when determining total Hg, dissolved gaseous Hg, and methylated Hg species in seawater. The required sample sizes were calculated using (1) the measurement uncertainty of a single-laboratory measurement of analytical methods used; (2) performance of the laboratories in interlaboratory comparison exercises; and (3) natural variability in Hg species/fractions in a selected case study in the Central Adriatic Sea. It was shown that the measurement uncertainty of a particular method and interlaboratory variability among laboratories have significant influence on data interpretation in case natural variability of Hg fractions is relatively small, such as for example the open seawater depth profiles. In contrary, in areas with large natural variability of Hg con tractions, such as coastal and contaminated sites, their influence on data interpretation is negligible. The present paper introduces the importance of proper estimation of measurement uncertainty in international programs, such as GEOTRACES, where data comparability is of fundamental importance to assess temporal and spatial trends of Hg measurements in the marine environment kemija okolja živo srebro primerjava true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2025 The Author(s). Neznano 2025-09-05 13:43:46 2025-09-05 13:43:46 2025-10-24 03:54:27 0000-00-00 00:00:00 2025 0 0 12 str. Art. 104498 Vol. 269 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-09-30 2025-02-03 2025-02-04 543 0304-4203 10.1016/j.marchem.2025.104498 225625859 RAZ_Zivkovic_Igor_2025.pdf RAZ_Zivkovic_Igor_2025.pdf 1 2AA2D1A8685708076C5B2DA4D37871F9 5d1c086254adaacf596ce6a235f2216e825ae5bcf607289563a5a1c520e3663b 576ef2b3-8a4e-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=34768 Institut Jožef Stefan 0 0 0