A novel analytical approach for the simultaneous measurement of nitrate and dissolved organic carbon in soil water
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Published:2021-04-21
Issue:4
Volume:25
Page:2159-2168
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ISSN:1607-7938
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Container-title:Hydrology and Earth System Sciences
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language:en
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Short-container-title:Hydrol. Earth Syst. Sci.
Author:
Yeshno EladORCID, Dahan Ofer, Bernstain Shoshana, Arnon ShlomiORCID
Abstract
Abstract. In this paper, we present a novel approach, enabling the
measurement of nitrate concentrations in natural soil porewater containing
natural soil dissolved organic carbon (DOC). The method is based on UV
absorbance spectroscopy, combined with fluorescence spectroscopy, for
simultaneous analysis of DOC and nitrate concentrations. The analytical
procedure involves deduction of the absorption caused by the DOC from the
total absorbance in the UV range that is attributed to both DOC and nitrate
in the water solution. The analytical concept has been successfully tested
in soil water samples obtained from five agricultural sites, as well as in
water samples obtained from a commercial humus soil mixture. We believe that the new analytical concept can provide a scientific foundation for
developing a sensor for real-time nitrate concentration measurements in
agricultural soils. As such, it can play a significant role in reducing
nitrate pollution in water resources, optimizing input application in
agriculture, and decreasing food production costs.
Funder
Ministry of Agriculture and Rural Development
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences,General Engineering,General Environmental Science
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