EPA Method 548 Analyte Back Catalog number: 30147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3346.6-100-AN Clopyralid, 100µg/ml in Acetonitrile, 1ml Price on request 54254 Silica (SiO2) Price on request 0393.12-K-IO n-Hexylbenzene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1077-16-3 Price on request