Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended VHG-PNAN-100 Na, 1000 µg/mL in 5% HNO3, 100ml Price on request 54501 Chloride (Cl-), 1000µg/mL in Water, 500ml Price on request VHG-PCRN-100 Cr, 1000 µg/mL in 5% HNO3, 100ml Price on request