What does "NO2-N" mean?
I recently purchased a nitrite test kit. Its instructions include both NO2 und NO2-N levels. What does NO2-N mean?
this is nitrite nitrogen, or in other words the N that is included in NO2.
Correspondingly, both values (NO2 and NO2-N) can be converted into each other by simply multiplying or dividing them by 3.3; their relevance is absolutely identical. The factor results from the atomic weights of oxygen and nitrogen. Nitrogen is slightly lighter, so the nitrogen amount in the nitrite ion is a little less than a third.
Dr. Bodo Schnell