Merck Ammonium Test Method: photometric Spectroquant , 2.0 - 150 mg/l NH4-N 2.6 - 193 mg/l NH4+, 100 Tests

Ammonium Test Method: photometric Spectroquant®, 2.0 - 150 mg/l NH₄-N 2.6 - 193 mg/l NH₄⁺