A Novel Approach to Non-Segmented Flow Analysis for Nitrate, Nitrite, and Ammonium in Water
Author Information
Author(s): D.J. Malcolme-Lawes, C. Pasquini
Primary Institution: Centrefor Research in Analytical Chemistry and Instrumentation, King's College London
Hypothesis
Can a high-performance continuous-flow analyser effectively determine nitrate, nitrite, and ammonium ions in potable waters?
Conclusion
The study demonstrates that the analyser can sequentially determine multiple analytes without modifying the apparatus and achieves high sensitivity.
Supporting Evidence
- The analyser allows sequential determination of multiple analytes without requiring modification to the manifold.
- The sensitivity achieved compares favourably with conventional flow-injection analysis.
- Limits of detection were found to be 5 ppb for NH4+, 30 ppb for NO3-, and 4 ppb for NO2-.
Takeaway
This study shows a new way to test water for certain chemicals quickly and accurately using a special machine.
Methodology
The study used a high-performance continuous-flow analyser with a computer-controlled valve switching system to analyze water samples for nitrate, nitrite, and ammonium.
Limitations
The authors did not have independent results for nitrite and ammonium determinations at the levels present in the samples.
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