Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Back Catalog number: VHG-INH41K-100 Availability: In the manufacturer's stock Price on request - + Recommended 82525 Method 8250 Acids Spiking Solution Price on request 2077.6-K-IP 2,3,4-Trichlorophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 15950-66-0 Price on request XA13300000CY Ethoprophos, 100µg/mL in Cyclohexane, 1ml Price on request