MA - EPH Matrix Spike Rev 1.0/1.1 Back Catalog number: 91489 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 19214 EPA Method 8020 Analytes Price on request 2719.4-50-ME Perfluorobutane sulphonate, potassium salt, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 29420-49-3 Price on request 92617 Carbamates Price on request