Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 5190-8368 Calcium, 10,000ug/ml,100ml 100,04 € 5190-8300 Palladium, 1000µg/ml in 20% HCl, 100ml 86,22 € 5190-8325 Zinc, 1000ug/ml, 100ml 25,87 €