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Soil Science Society of America Journal Abstract -

Flow Injection Analysis of Nitrate in Soil Extracts—Evaluation of a Nitrate-Selective Flow Electrode Method1


This article in SSSAJ

  1. Vol. 45 No. 2, p. 446-448

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  1. E. B. Schalscha,
  2. T. Schirado and
  3. I. Vergara2



Nitrate (NO3-) in soil saturation extracts was determined by a flow injection analysis (FIA) procedure and the results evaluated by comparing with the reduction-distillation and the Cd-reduction methods. Results show that the FIA using a NO3--specific end-window flow electrode designed by Ruzicka and Hansen gave the same results as the other two methods. The range of application is from 0.5 to 100 µg/ml of NO3-N. The method is simple and rapid. More than 20 samples/hour can easily be determined. The FIA is appropriate for soil extracts and water analysis. The cost of the equipment is low, which makes it attractive for laboratories where financial resources are limited.

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