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Journal of Automatic Chemistry
Volume 10, Issue 4, Pages 192-197

A novel approach to non-segmented flow analysis: Part 3. Nitrate, nitrite and ammonium in waters

Centre for Research in Analytical Chemistry and Instrumentation, King's College London, Strand, London WC2R 2LS, UK

Copyright © 1988 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A high-performance continuous-flow analyser is used for the analysis of nitrate, nitrite and ammonium ion in potable waters. The results demonstrate that (1) the analyser allows the sequential determination of a number of analytes without requiring modification to the manifold; (2) the use of programmed slicing of the reaction mixture allows a wide range of analyte concentrations to be handled; and (3) that the sensitivity achieved compares favourably with the best available from conventional flow-injection analysis. The limits of detection were found to be 5 ppb for NH4+, 30 ppb for NO3-, and 4 ppb for NO2-.