Why does TNT880 include two test vials?

Document ID

Document ID TE1207

Published Date

Published Date 27/05/2017
Question
Why does TNT880 include two test vials?
Summary
TNT880 red and green vials
Answer
The red vial that is digested will give a total nitrogen value. The green vial that is not digested, gives a combined nitrate + nitrite reading. If you subtract the Nitrate + Nitrite value from the total nitrogen reading, the test will give a Kjeldahl value.