EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 15900-0230-100AN5 Atrazin, 100μg/ml in Acetonitrile, 5ml Price on request 50151 Phenylarsine oxide Standard Price on request 674656 D4-Azoxystrobin, 10mg Price on request