EPA Method 525 Internals & Surrogates Back Catalog number: 91161 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended T-PFOS Potassium perfluorooctanesulfonate (Technical Grade), 1.2ml x 50ug/ml, methanol Price on request 97480 VOC Standard Price on request 2762.13-100-AN 4,4'-Methylenedianiline,100 µg/mL,acetonitrile,1mL, Price on request