EPA Method 624 Surrogate Standard Back Catalog number: 19112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0704.13-500-IO 1,4,5-Trimethylnaphthalene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2131-41-1 Price on request 71420 Atrazine-desisopropyl Price on request 15900-3795C-100M1 Pentachlorphenol-13C6, 100µg/ml in MeOH, 1ml Price on request