气候变化领域集成服务门户(CCPortal): Inter-laboratory comparison of cryogenic water extraction systems for stable isotope analysis of soil water

CCPortal

DOI	10.5194/hess-22-3619-2018
	Inter-laboratory comparison of cryogenic water extraction systems for stable isotope analysis of soil water
	Orlowski N.; Breuer L.; Angeli N.; Boeckx P.; Brumbt C.; Cook C.S.; Dubbert M.; Dyckmans J.; Gallagher B.; Gralher B.; Herbstritt B.; Hervé-Fernández P.; Hissler C.; Koeniger P.; Legout A.; Joan MacDonald C.; Oyarzún C.; Redelstein R.; Seidler C.; Siegwolf R.; Stumpp C.; Thomsen S.; Weiler M.; Werner C.; McDonnell J.J.
发表日期	2018
ISSN	1027-5606
起始页码	3619
结束页码	3637
卷号	22 期号:7
英文摘要	For more than two decades, research groups in hydrology, ecology, soil science, and biogeochemistry have performed cryogenic water extractions (CWEs) for the analysis of δ2H and δ18O of soil water. Recent studies have shown that extraction conditions (time, temperature, and vacuum) along with physicochemical soil properties may affect extracted soil water isotope composition. Here we present results from the first worldwide round robin laboratory intercomparison. We test the null hypothesis that, with identical soils, standards, extraction protocols, and isotope analyses, cryogenic extractions across all laboratories are identical. Two standard soils with different physicochemical characteristics along with deionized (DI) reference water of known isotopic composition were shipped to 16 participating laboratories. Participants oven-dried and rewetted the soils to 8 and 20% gravimetric water content (WC), using the deionized reference water. One batch of soil samples was extracted via predefined extraction conditions (time, temperature, and vacuum) identical to all laboratories; the second batch was extracted via conditions considered routine in the respective laboratory. All extracted water samples were analyzed for δ18O and δ2H by the lead laboratory (Global Institute for Water Security, GIWS, Saskatoon, Canada) using both a laser and an isotope ratio mass spectrometer (OA-ICOS and IRMS, respectively). We rejected the null hypothesis. Our results showed large differences in retrieved isotopic signatures among participating laboratories linked to soil type and soil water content with mean differences compared to the reference water ranging from C18.1 to 108.4 for δ2H and +1.8 to 14.9‰ for δ18O across all laboratories. In addition, differences were observed between OA-ICOS and IRMS isotope data. These were related to spectral interferences during OA-ICOS analysis that are especially problematic for the clayey loam soils used. While the types of cryogenic extraction lab construction varied from manifold systems to single chambers, no clear trends between system construction, applied extraction conditions, and extraction results were found. Rather, observed differences in the isotope data were influenced by interactions between multiple factors (soil type and properties, soil water content, system setup, extraction efficiency, extraction system leaks, and each lab's internal accuracy). Our results question the usefulness of cryogenic extraction as a standard for water extraction since results are not comparable across laboratories. This suggests that defining any sort of standard extraction procedure applicable across laboratories is challenging. Laboratories might have to establish calibration functions for their specific extraction system for each natural soil type, individually. © 2018 Author(s).
语种	英语
scopus关键词	Cryogenics; Deionized water; Isotopes; Laboratories; Network security; Routers; Soil moisture; Soil testing; Calibration functions; Extraction efficiencies; Interlaboratory comparison; Isotope ratio mass spectrometer; Laboratory inter-comparison; Physicochemical characteristics; Spectral interference; Stable-isotope analysis; Extraction; calibration; comparative study; extraction method; hydrogen isotope; hydrogeochemistry; isotopic composition; laboratory method; oxygen isotope; physicochemical property; soil water; stable isotope; Canada; Saskatchewan; Saskatoon
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/159981
作者单位	Orlowski, N., Global Institute for Water Security, School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada, Institute for Landscape Ecology and Resources Management, Research Centre for BioSystems, Justus Liebig University Giessen, Giessen, Germany, Department of Hydrology, Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany; Breuer, L., Institute for Landscape Ecology and Resources Management, Research Centre for BioSystems, Justus Liebig University Giessen, Giessen, Germany, Centre for International Development and Environmental Research, Justus Liebig University Giessen, Giessen, Germany; Angeli, N., INRA, UHP Ecologie et Ecophysiologie Forestières, INRA Centre de Nancy, Champenoux, France; Boeckx, P., Isotope Bioscience Laboratory, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium; Brumbt, C., Instituto de Ciencias de la Tierra, Universidad Austral de Chile, Valdivia, Chile; Cook, C.S., Department of Ecosystem Scienc...
推荐引用方式 GB/T 7714	Orlowski N.,Breuer L.,Angeli N.,et al. Inter-laboratory comparison of cryogenic water extraction systems for stable isotope analysis of soil water[J],2018,22(7).
APA	Orlowski N..,Breuer L..,Angeli N..,Boeckx P..,Brumbt C..,...&McDonnell J.J..(2018).Inter-laboratory comparison of cryogenic water extraction systems for stable isotope analysis of soil water.Hydrology and Earth System Sciences,22(7).
MLA	Orlowski N.,et al."Inter-laboratory comparison of cryogenic water extraction systems for stable isotope analysis of soil water".Hydrology and Earth System Sciences 22.7(2018).