EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3465.12-10-T Oxadiazon-hydroxy ,10 µg/mL,toluene,1mL, Price on request M-8315-R2-DNPH Carbonyl DNPH Derivative Mix, 100µg/ml in AcN, 1ml Price on request 92477 VRX 8260 IS & Surrogate Standard Price on request