Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 52145A Method 200.8/1638/1640 Internal Standard, 10µg/ml in 2%-HNO3, 4x25ml Price on request VHG-PNIN-100 Ni @ 1000 µg/mL in 5% HNO3, 100ml Price on request 5190-8279 Copper, 1000ug/ml, 100ml 30,22 €