EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674010 Monuron, 100 µg/ml, Acetonitrile, 5ml Price on request 58003 Lithium (Li) Price on request 2053.14-100-IO Benzyl benzoate, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 120-51-4 Price on request