500 µg/mL of each analyte in Methylene chlorideAcenaphthylene Di-n-butyl phthalate Benzo[b]fluoranthene 1,4-Dichlorobenzene Bis(2-chloroethyl) ether 3,3'-Dichlorobenzidine Bis(2-ethylhexyl)phthalate Dimethyl phthalateBis(2-chloroisopropyl) ether 2,6