EPA Method 531.1 Individual Analytes Back Catalog number: 31241 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 4PM120 2,3',4,5,5'-Pentachloro-4'-methoxybiphenyl, 1.2ml x 50ug/ml, nonane Price on request 675583 Thiofanox-sulfoxide, 10.0 µg/ml, Acetonitrile, 1 Price on request 9348.17-100-ME Omeprazole, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 73590-58-6 Price on request