EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PFAC-MXF Native Replacement PFAS Solution/Mix, 2µg/ml in MeOH, 1,2ml Price on request 10213 EPA Method 617/8080/8250/8270 - Analytes Price on request 94083 Estrone Mix Price on request