Method 8121 - Surrogate Standard Back Catalog number: 95989 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PFOS-001S Perfluorooctane sulfonic acid, 100µg/ml in MeOH, 1ml Price on request 677179 4-Nonylphenol-di-ethoxylate, 50 µg/ml, Acetone, Price on request 59365 Phosphate as P Price on request