Multi-Element Calibration Standard-4 Back Catalog number: 50013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2127.12-K-IO Arochlor 1248 , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 12672-29-6 Price on request EPA-PAH-STK Native PAH Solution/Mixture, 1.2ml, toluene Price on request 0341.12-K-IO Biphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 92-52-4 Price on request