Ammonium Test Method: colorimetric, indophenol blue, with color card and comparator block with short test tubes 0.2-0.5-0.8-1.2-1.6- 2-3-5-8 mg/l NH₄⁺ 0.16-0.4-0.6-0.9-1.2-1.6-2.3-3.9-6.2 mg/l NH₄-N MQuant – 200 Tests