Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 50843 Sulfide (S), 1000µg/mL in Tr. NaOH / Water, 3 x 20ml Price on request 5190-9767 ICH/USP Oral Target Elements Standard B 198,58 € 59927 Fluoride (F-), 10µg/mL in Water, 500ml Price on request