200 µg/mL of each analyte in Methanol.Chloroethane 1,1,1,2-Tetrachloroethane1,2-Dibromoethane 1,1,2,2-Tetrachloroethane1,1-Dichloroethane Tetrachloroethene1,2-Dichloroethane 1,1,1-Trichloroethane1,1-Dichloroethene 1,1,2-Trichloroethane cis-1,2-Dichl