Ammonia as (NH4+) Back Catalog number: 59979 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93988 PAH Standard, 1000µg/ml in methylene chloride, 1ml Price on request KBIO-BG100-10ML ß-glucuronidase from ocean-fresh Red Abalone, >100,000 u/ml, 10ml Price on request EPA-23CS1,2,4,5 Individual Calibration Solutions, 500ul, nonane Price on request