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Direct nesslerization of ammonia and nitrate in fresh-water

Published online by Cambridge University Press:  01 February 2009

H. L. Golterman
H. L. Golterman*
Affiliation:
Station biologique de la Tour du Valat, le Sambuc, 13200 Arles, France
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Abstract

A method for measuring NH3 colorimetrically by Nesslerization without distillation is proposed. Precipitation of CaCO3 is prevented by adding Na salicylate, which chelates the Ca2+, but not the Hg2+ of Nessler's reagent. NO3 - can be measured in the same way after reduction with TiCl3. Precision and accuracy are those of a colorimetric method ; the sensitivity is somewhat lower than with the indophenol-blue method using phenol, but about the same as when using salicylate.

Keywords

methodammonianitratenitriteméthodeammoniaquenitrates
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 27 , Issue 1 , 1991 , pp. 99 - 101
Copyright
© Gauthier-Villars, 1991

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