Articles | Volume 29, issue 2
https://doi.org/10.5194/hess-29-525-2025
https://doi.org/10.5194/hess-29-525-2025
Technical note
 | 
24 Jan 2025
Technical note |  | 24 Jan 2025

Technical note: A fast and reproducible autosampler for direct vapor equilibration isotope measurements

Jonas Pyschik, Stefan Seeger, Barbara Herbstritt, and Markus Weiler

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This preprint is open for discussion and under review for Hydrology and Earth System Sciences (HESS).
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Cited articles

Allen, S. T. and Kirchner, J. W.: Potential Effects of Cryogenic Extraction Biases on Plant Water Source Partitioning Inferred from Xylem-water Isotope Ratios, Hydrol. Process., 36, e14483, https://doi.org/10.1002/hyp.14483, 2022. a
Bertrand, G., Masini, J., Goldscheider, N., Meeks, J., Lavastre, V., Celle-Jeanton, H., Gobat, J.-M., and Hunkeler, D.: Determination of Spatiotemporal Variability of Tree Water Uptake Using Stable Isotopes (δ18O, δ2H) in an Alluvial System Supplied by a High-Altitude Watershed, Pfyn Forest, Switzerland, Ecohydrology, 7, 319–333, https://doi.org/10.1002/eco.1347, 2014. a
Boumaiza, L., Chesnaux, R., Walter, J., and Stumpp, C.: Assessing Groundwater Recharge and Transpiration in a Humid Northern Region Dominated by Snowmelt Using Vadose-Zone Depth Profiles, Hydrogeol. J., 28, 2315–2329, https://doi.org/10.1007/s10040-020-02204-z, 2020. a
Ceperley, N., Gimeno, T. E., Jacobs, S. R., Beyer, M., Dubbert, M., Fischer, B., Geris, J., Holko, L., Kübert, A., Le Gall, S., Lehmann, M. M., Llorens, P., Millar, C., Penna, D., Prieto, I., Radolinski, J., Scandellari, F., Stockinger, M., Stumpp, C., Tetzlaff, D., Van Meerveld, I., Werner, C., Yildiz, O., Zuecco, G., Barbeta, A., Orlowski, N., and Rothfuss, Y.: Toward a Common Methodological Framework for the Sampling, Extraction, and Isotopic Analysis of Water in the Critical Zone to Study Vegetation Water Use, WIREs Water, 11, e1727, https://doi.org/10.1002/wat2.1727, 2024.  a
Chesnaux, R. and Stumpp, C.: Advantages and Challenges of Using Soil Water Isotopes to Assess Groundwater Recharge Dominated by Snowmelt at a Field Study Located in Canada, Hydrolog. Sci. J., 63, 679–695, https://doi.org/10.1080/02626667.2018.1442577, 2018. a
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Short summary
We developed a device (named VapAuSa) that automates stable water isotope analysis. Stable water isotopes are a natural tracer that many researchers use to investigate water (re-)distribution processes in environmental systems. VapAuSa helps to analyse such environmental samples by automating a formerly tedious manual process, allowing for higher sample throughput. This enables larger sampling campaigns, as more samples can be processed before reaching their limited storage time.
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