What is the ammonia TNTPlus chemical reaction?

Document ID

Document ID TE154

Version

Version 4.0

Status

Status Published

Published Date

Published Date 04/26/2018
Question
What is the ammonia TNTPlus chemical reaction?
Summary
Chemical reaction and explanation for TNTplus nitrogen ammonia reagents
Answer
In each nitrogen, ammonia method there is a "Summary of method" section. This section details the chemistry explanation and reactions that occur using the reagent set. The nitrogen, ammonia TNTplus vials (Product #'s TNT830, TNT831, and TNT832) following method 10205, use salicylate and have the following chemical reaction:
Ammonium ions react at pH 12.6 with hypochlorite ions and salicylate ions in the presence of sodium nitroprusside as a catalyst to form indophenol. The amount of color formed is directly proportional to the ammonia nitrogen present in the sample.

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