EPA Method 507 Analyte Mix #1 Back Catalog number: 30182 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended L-PFBS Potassium perfluoro-1-butanesulfonate, 1.2ml x 50ug/ml, methanol Price on request 675591 Transfluthrin, 100 µg/ml, Ethyl acetate, 5ml Price on request 50333 Sulfite (SO32-) Price on request