EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-27-S 2,7-Dichlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 682968 Bispyribac sodium salt, 100 µg/ml, Methanol, 5ml Price on request 677676 Maduramicin ammonium, 100mg Price on request