Ben-Gurion University of the Negev Research and Development Authority

Deutschetelekom Ag

Shlomi Arnon

Gerhard Kadel

Ofer Dahan

Elad Yeshno

Hans Joachim Einsiedler

A method for real-time determining a concentration level of nitrate in a water sample collected from soil at a given site, the water sample contains an unknown composition and unknown concentration of DOC, the method includes: (A) during an offline stage: (a.1) obtaining a testing sample from the soil; (a.2) determining first and second wavelengths correlated, respectively, to concentration levels of the DOC and nitrate in the testing sample; (a.3) creating a calibration equation for this site; and, (B) during real-time: (b.1) separately impinging on a real-time water sample from the soil light in said two wavelengths; (b.2) determining respective absorbances by the real-time sample in said two wavelengths; and (c) substituting the respective absorbances in the calibration equation to obtain the nitrate concentration in the real-time sample.

System and method for determining aqueous nitrate concentration in solution containing dissolved organic carbon

A system for measuring with the aid of light absorption spectrometry the concentration of one or more analytes in porewater in soil, the system comprising: one or more monitoring unit(s), each monitoring unit comprising a porewater sampler (), an optical flow cell () with a tube connecting the liquid inlet port of said optical flow cell to said porewater sampler; and vacuum arrangement to enable extraction of porewater; at least one light source () for generating a light beam to be transmitted through said optical flow cell (); and at least one detector () for obtaining spectral information from the beam exiting said optical flow cell. A method of measurement is also provided.

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Lehavim, Israel

Shlomi Arnon