EPA Method 8250 Back Catalog number: 82522 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11327.15-100-ME Oxcarbazepine,100 µg/mL,MeOH,1mL, Price on request 52147 Method 1640 Tuning Standard Price on request 79120 Butachlor Price on request