气候变化领域集成服务门户(CCPortal): Technical note: Evaluation of a low-cost evaporation protection method for portable water samplers

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DOI	10.5194/hess-24-5821-2020
	Technical note: Evaluation of a low-cost evaporation protection method for portable water samplers
	Von Freyberg J.; L. A. Knapp J.; Rücker A.; W. Kirchner J.
发表日期	2020
ISSN	1027-5606
起始页码	5821
结束页码	5834
卷号	24 期号:12
英文摘要	Automated field sampling of streamwater or precipitation for subsequent analysis of stable water isotopes (2H and 18O) is often conducted with off-the-shelf automated samplers. However, when water samples are stored in the field for days and weeks in open bottles inside autosamplers, their isotopic signatures can be altered by evaporative fractionation and vapor mixing. We therefore designed an evaporation protection method which modifies autosampler bottles using a syringe housing and silicone tube, and we tested whether this method reduces evaporative fractionation and vapor mixing in water samples stored for up to 24 d in 6712 full-size portable samplers (Teledyne ISCO, Lincoln, USA). Laboratory and field tests under different temperature and humidity conditions showed that water samples in bottles with evaporation protection were far less altered by evaporative fractionation and vapor mixing than samples in conventional open bottles. Our design is a cost-efficient approach to upgrade the 1 L sample bottles of the ISCO autosamplers, allowing secure water sample collection in warm and dry environments. Our design can be readily adapted (e.g., by using a different syringe size) to fit the bottles used by many other field autosamplers. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	Costs; Evaporation; Isotopes; Mixing; Silicones; Syringes; Cost-efficient; Dry environment; Field sampling; Isotopic signatures; Protection methods; Stable water isotopes; Technical notes; Temperature and humidities; Bottles; automation; cost analysis; drinking water; evaporation; sampler
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159238
作者单位	Von Freyberg, J., Department of Environmental Systems Science, Ethz, Zurich, 8092, Switzerland, Mountain Hydrology and Mass Movements, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland, School of Architecture, Civil and Environmental Engineering, Epfl, Lausanne, 1015, Switzerland; L. A. Knapp, J., Department of Environmental Systems Science, Ethz, Zurich, 8092, Switzerland, Department of Earth Sciences, Durham University, Durham, DH13LE, United Kingdom; Rücker, A., Department of Environmental Systems Science, Ethz, Zurich, 8092, Switzerland, Mountain Hydrology and Mass Movements, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland; W. Kirchner, J., Department of Environmental Systems Science, Ethz, Zurich, 8092, Switzerland, Mountain Hydrology and Mass Movements, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland, Department of Earth and Planetary Science...
推荐引用方式 GB/T 7714	Von Freyberg J.,L. A. Knapp J.,Rücker A.,et al. Technical note: Evaluation of a low-cost evaporation protection method for portable water samplers[J],2020,24(12).
APA	Von Freyberg J.,L. A. Knapp J.,Rücker A.,&W. Kirchner J..(2020).Technical note: Evaluation of a low-cost evaporation protection method for portable water samplers.Hydrology and Earth System Sciences,24(12).
MLA	Von Freyberg J.,et al."Technical note: Evaluation of a low-cost evaporation protection method for portable water samplers".Hydrology and Earth System Sciences 24.12(2020).