MA - EPH Fractionation Surrogate Spike Back Catalog number: 51039 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9348.17-K-ME Omeprazole Price on request 9022.4-100-AN 1,4-Dinitrosopiperazine-d8, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 69340-07-4 Price on request PN-70S 1,2,3,6,7,8-Hexachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request