Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 5190-8309 Silver (Ag) standard, 1000µg/mL, in 5% HNO3, 100ml 701,40 Kč 526,05 Kč SCP150-800-205 TAN 2mg KOH /g, 75g Price on request 54105 Phosphate (PO4-3) as P, 1000µg/ml in Water, 100ml Price on request