Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 54102 Fluoride (F-) Price on request VHG-INO3-100 Nitrate Standard: NO3-, 1000µg/ml in Water, 100ml Price on request 5190-8279 Copper, 1000ug/ml, 100ml 28,49 €