EPA Method 515.1 Internal Standard Back Catalog number: 30023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C16173500 Phthalic acid, bis-iso-butyl ester, certified, 0.25g Price on request CBP-2367-D 2,3,6,7-Tetrachlorobiphenylene, 1.2ml x 1x10-4M, dimethylsulfoxide Price on request WMF-EX Reference Fish Tissue Extract (Isooctane/20% Salmon Oil), 3g, Isooctane Price on request