Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 5190-8277 Cobalt, 1000ug/ml, 100ml 31,66 € 59929 Fluoride (F-), 1.0µg/mL in Water, 500ml Price on request 5190-8309 Silver (Ag) standard, 1000µg/mL, in 5% HNO3, 100ml 30,22 €