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The determination of ammonia and total ionic inorganic nitrogen in sea water

Published online by Cambridge University Press:  11 May 2009

J. P. Riley  and
P. Sinhaseni
J. P. Riley
Affiliation:
The Department of Oceanography, The University, Liverpool
P. Sinhaseni
Affiliation:
The Department of Oceanography, The University, Liverpool
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Extract

Microdiffusion using a Cavett flask has been employed instead of vacuum distillation for the separation of ammonia from sea water; diffusion is approximately 75% complete after 24 h at 70°C. The recovered ammonia is determined by a modification of the phenate-hypochlorite method.

Raney nickel in the presence of ethylenediamine-tetraacetic acid has been used for the reduction of nitrate and nitrite to ammonia. The latter is separated by microdiffusion and determined colorimetrically. The method showed a coefficient of variation of 2·5% on a sample of sea water containing

No interference was encountered from a variety of organic nitrogen compounds.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 36 , Issue 1 , February 1957 , pp. 161 - 168
Copyright
Copyright © Marine Biological Association of the United Kingdom 1957

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