Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 5190-8298 Nickel, 1000ug/ml, 100ml 25,67 € 56232 Germanium (Ge), 100 µg/mL in 2%-HNO3 / Water, 4x25ml Price on request 5190-8352 Aluminum 10,000ug/ml, 100ml 99,26 €