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Microdetermination of ammonia using an ammonia gas-sensing electrode and a minicomputer

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Summary

The multiple addition method has been used in combination with Gran plots for the determination of 2×10−4 M to 1×10−6 M (2.8 ppm to 14 ppb) of ammonia nitrogen. The ammonia was determined with an ammonia gas-sensing electrode. A computer-controlled titration system was used for the titration and for dataprocessing. Results within ±2% of the added amount are obtained down to ∼1.5×10−6 M (20 ppb) of ammonia nitrogen.

Zusammenfassung

Das Verfahren mit bekannten Zusätzen wurde in Kombination mit der von Gran angegebenen Methode der Äquivalenzpunktbestimmung für die Bestimmung von 2 · 10 bis 10−6 Mol (2,8 ppm-14 ppb) Ammoniakstickstoff angewendet. Der Ammoniak wurde mit einer gasempfindlichen Elektrode gemessen. Ein computer-gesteuertes Titrationssystem wurde für Titration und Datenverarbeitung verwendet. Ergebnisse innerhalb ± 2% der zugesetzten Menge wurden bis herunter auf etwa 1,5 · 16−6 Mol (20 ppb) Ammoniakstickstoff erhalten.

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Authors and Affiliations

  1. Lawrence Livermore Laboratory, University of California, 94550, Livermore, Cal., USA

    Walter Selig, Jack W. Frazer & Arthur M. Kray

Authors
  1. Walter Selig
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  2. Jack W. Frazer
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  3. Arthur M. Kray
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Work performed under the auspices of the U. S. Atomic Energy Commission.

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Selig, W., Frazer, J.W. & Kray, A.M. Microdetermination of ammonia using an ammonia gas-sensing electrode and a minicomputer. Mikrochim Acta 64, 675–682 (1975). https://doi.org/10.1007/BF01225629

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  • DOI: https://doi.org/10.1007/BF01225629

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