Why are TNTplus Ammonia Salicylate reagents EPA equivalent but the TNT Amver Salicylate reagents are not?

Document ID

Document ID TE123

Published Date

Published Date 04/09/2019
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Question
Why are TNTplus Ammonia Salicylate reagents EPA equivalent but the TNT Amver Salicylate reagents are not?
Summary
Nitrogen Ammonia TNTplus EPA reporting
Answer
The Ammonia TNTplus Reagent Sets TNT830, TNT831, and TNT832 are considered equivalent for United States Environmental Protection Agency (USEPA) wastewater reporting. The Ammonia Reagent Sets TNT Amver are not considered equivalent for USEPA reporting.

Hach has created an EPA formatted method with side by side support data to follow the MUR and state equivalency for the TNTplus Ammonia Salicylate reagents. This has not been done for the older TNT Amver Salicylate reagents. If a user wants to consider the older Test N Tube ammonia tests for regulatory compliance they can still discuss with their regulatory authority.

Reference EPA formatted method, " TNTplus Ammonia-Spectrophotometric Measurement of Ammonia Nitrogen and Total Kjeldahl Nitrogen in Water and Wastewater" for information on USEPA equivalency to 350.1 and 351.1.

For more information on phenate/salicylate chemistry, refer to the Water Analysis Handbook (WAH).

In addition, the attached application note describes how customers can reduce headaches experienced with current methods, and work with their local regulator to get the DEP or DEQ to accept the method for reporting.
The attached case study was also recently published by Treatment Plant Operator Link:Treatment Plant Operator Magazine.
 
As with any method used for compliance reporting, always consult with your local regulatory authority.
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