Fluoride (F-), 10µg/mL in Water, 500ml Back Catalog number: 59927 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57424 Chromium (Cr), 1µg/ml in 2%-HNO3 / Water, 100ml Price on request 54112 Ammonia as (NH4+) Price on request 54104 Nitrite (NO2-) as N, 1000µg/ml in Water, 100ml Price on request