EPA Method 624 Surrogate Standard Back Catalog number: 19112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673272 Ethiofencarb-sulfone, 10.0 µg/ml, Acetonitrile, Price on request BDF-2378 2,3,7,8-Tetrabromodibenzofuran, 1.2ml x 50ug/ml, toluene Price on request 675655 Sebuthylazine, 10 µg/ml, Acetonitrile, 10ml Price on request