AMMONIUM TESTING METHOD 1. Take 3 ml of water sample in the test tube. 2. Add 4 drops of ammonium reagent - 1(NH-1) and mix well, The colour that forms is compared with ammonium colour chart immediately and record the ammonium value AMMONIUM TESTING METHOD 1. Take 3 ml of water sample in the test tube. 2. Add 4 drops of ammonium reagent - 1(NH-1) and mix well, The colour that forms is compared with ammonium colour chart immediately and record the ammonium value