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A simple method for determining ammonia in water at the ppm level

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Summary

A simple colorimetric method is described for the determination of ammonia in water at the ppm level. Indophenol blue color is produced in an alkaline borate medium using phenol and hypo-chlorite as reagents. Comparison of color intensity is carried out by means of test tubes. When metal ions that interfere with ammonia determination are present in water, the interference can be prevented by applying a diffusion technique.

Zusammenfassung

Eine einfache kolorimetrische Methode zur Bestimmung von ppm-Mengen Ammoniak in Wasser wurde beschrieben. In Alkaliborat-Medium führen Phenol und Hypochlorit als Reagenzien zur Bildung von Indophenolblau. Der Farbvergleich wird in Reagensgläsern durchgeführt. Befinden sich im Wasser störende Metallionen, so kann man diese Störung mit Hilfe der Diffusionstechnik umgehen.

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Authors and Affiliations

  1. Department of Chemistry, University of Singapore, Singapore 10, Republic of Singapore

    Hong-Kwen Boo &  T. S. Ma

Authors
  1. Hong-Kwen Boo
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  2. T. S. Ma
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Additional information

Visiting professor at the University of Singapore, 1975–1976, on sabbatical leave from the City University of New York.

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Boo, HK., Ma, T.S. A simple method for determining ammonia in water at the ppm level. Mikrochim Acta 66, 515–523 (1976). https://doi.org/10.1007/BF01220109

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  • DOI: https://doi.org/10.1007/BF01220109

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