Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 6
Articles | Volume 30, issue 6
https://doi.org/10.5194/hess-30-1801-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-1801-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 6
Technical note
 | 
01 Apr 2026
Technical note |  | 01 Apr 2026

Technical note: Efficiency of various evaporation barriers for use in automated water samplers for subsequent water isotope analysis

Christin Mueller, Tim Giorgio Pekarev, and Kay Knoeller

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Short summary
Automatic water samplers help to collect water for isotope analysis, but if the samples are stored in open bottles for long periods of time, their composition can change due to evaporation. We have tested various barriers to prevent this and found that the tube-dip-in method as an evaporation barrier is the most practical solution. Our results highlight the importance of bottle design and handling, especially for small sample volumes, to ensure accurate water analysis.
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