Issues related to ammonia nitrogen testing
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Ammonia nitrogen was detected using the sodium hydroxide reagent method. For the same water sample, 5 milliliters were used and an absorbance of 0.620 was obtained; plugging this value into the formula yielded a result of 21. When 1 milliliter was used, the absorbance was 0.318, and inserting this value into the formula gave a result of 59. I would like to ask the experts: which result should I use as the reference? It’s been bothering me for a long time.
Using distillation is very convenient and easy to operate.
We use distillation here as well, but it seems that distillation isn’t very useful.