Ammonium test paper • Quick and easy determination of ammonium and ammonia • The test paper can be used for the rapid detection of ammonium ions as well as for gaseous ammonia. • The white paper turns brownish-yellow in the presence of ammonium ions or NH3. • This test paper is specific for the determination of NH4+. Product data • Presentation: Pack of 200 strips 20x70 mm • Color reaction: white → brown-yellow • Limit of sensitivity: 10 mg/l NH4+