EPA Method 634 Analytes Back Catalog number: 40050 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57183 Bismuth (Bi) Price on request 681680 6-Chloronicotinic acid, 100mg 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