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2. Principle
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Nitrate present in seawater samples is quantitatively reduced by copperised cadminum to nitrite in the presence of ammonium ions and NH3, i.e. a very weak alkaline ammonia buffer solution. This reaction is explained by the following equation: NO3- + (Cd)s + 2NH 4+ + 2NH3 No2- + Cd (NH3)4++ + H2O |
Last modified: Thursday, 24 November 2011, 9:12 AM