Simultaneous spectrophotometric determination of nitrite and nitrate by flow injection analysis |
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| Authors: | Leif Anderson |
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| Institution: | Department of Analytical Chemistry, Chalmers University of Technology and University of Gothenburg, S-412 96 GöteborgSweden |
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| Abstract: | The flow injection principle is used in the photometric determination of nitrite and nitrate with sulfanilamide and N-(1-naphthyl)ethylenediamine as reagents. An on-line copper-coated cadmium reductor reduces nitrate to nitrite. The detection limit is 0.05 μM for nitrite and 0.1 mM for nitrate at a total sample volume of 200 μM. Up to 30 samples can be analyzed per hour with a relative precision of ca. 1%. |
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