15N3-Atrazine, 100 µg/ml, Acetonitrile, 1ml Back Catalog number: 678256 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 673920 D3-Chloridazon-methyl-desphenyl, 100 µg/ml, Aceto Price on request 8547.11-50-ME 2H,2H,3H,3H-Perfluoroundecanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 34598-33-9 Price on request 91161 EPA Method 525 Internals & Surrogates Price on request