Titration of Nitrogen According to Kjeldahl Method

Analysis outlining the titration procedure for determining nitrogen according to the Kjeldahl method. This analysis, which is performed using the the Schott Instruments TitroLine 6000 Routine Titrator or TitroLine 7000 Advanced Titrator, is suitable for samples that contain nitrate or protein. The sample is digested with sulfuric acid in the presence of a catalyst that converts organically bound nitrogen to ammonium sulfate. The digestion solution is treated with NaOH in a distillation apparatus and the released ammonia (NH3) is distilled into a solution of boric acid. This solution is then titrated with HCl or H2SO4 to a pH endpoint of 4.65.

Titration of Nitrogen According to Kjeldahl Method

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