Perfluorooctane sulfonic acid, 100µg/ml in MeOH, 1ml Back Catalog number: PFOS-001S Availability: In the manufacturer's stock Price on request - + Recommended 33001 EPA Method 524.2 - Revision 4.0 Price on request DF-149-S 1,4,9-Trichlorodibenzofuran, 1.2ml x 50ug/ml, toluene Price on request 30023 EPA Method 515.1 Internal Standard Price on request