EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 53093 Trace Metals 2 Price on request 38157 CWA Oxygenates Price on request MET-11013BM1-1ML Acetochlor OA, 100µg/ml in MeOH, 1ml Price on request