METHOD total nitrogen determination by capillary electrophoresis

摘要

Method for determination of total nitrogen in plant samples, characterized in that it comprises thermal decomposition of the acid plant sample samples fold dilution of the sample to ammonium nitrogen content of not more than 1000 mg / L, and performing analysis by capillary electrophoresis in a quartz capillary effective length of 0.5 m , an internal diameter of 75 mm to obtain an electrophoretogram, characterized in that the total nitrogen content determined by ammonium nitrogen and residual nitrate and nitrite ions, and for about EFINITIONS ammonium, an aqueous electrolyte solution comprising lead benzimidazole, 18-crown-6-ether, sodium sulfate at a positive voltage of 12 kV at the capillary and a wavelength detection - 254 nm and to determine the method of capillary electrophoresis of residual nitrate and nitrite ions used aqueous leading electrolyte comprising potassium chromate, methenamine and Trilon B at negative voltage to 14 kV and the capillary wavelength detection - 254 nm.