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Automatic determination of total soluble nitrogen in soil extracts



Automatic determination of total soluble nitrogen in soil extracts



Landwirtschaftliche Forschung 40(4): 295-302



A continuous flow system for the sutomatic determination of "total soluble nitrogen" in soil extracts was tested and optimised with special attention to the use of 0.01 M CaCl2 extracts. Firstly, organic compounds were digested at pH4 by K2S2O8. Thereafter, NH4+ originally present and formed by digestion was converted to NO3- by the UV in radiation. NO3- was then determined colorimetrically after reduction to NO2-.

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Accession: 001533999

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