Retention Time Verification Standard Back Catalog number: 51136 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MA9064 80.000 µS/cm conductivity solution (230mL) Price on request DF-123789-S 1,2,3,7,8,9-Hexachlorodibenzofuran , 1.2ml x 50ug/ml, nonane Price on request S274982 Serotonin-d4 Hydrochloride, 2,5mg Price on request