EPA Method 551.1 Performance Check Soln Back Catalog number: 30114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8215.12-K-AN 2-Methylbutanal-PFBOA derivative, 1000µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. Price on request 94714 Semi-Volatile Standard Price on request 673753 Butralin, 100 µg/ml, Ethyl acetate, 5ml Price on request