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Table of Contents < Method 611 Method 614 >  Method 612 The USEPA method 612 is an analytical method which utilizes a methylene chloride extraction of municipal or industrial wastewater, concentrated after clean-up to 1-mL (in hexane) and a gas chromatograph equipped with a packed column to perform theseparation of Chlorinated Hydrocarbons. To detect the GC eluant, an electron capture detector (ECD) is used.  CHLORINATED HYDROCARBONS MIX 2-Chloronaphthalene 1,2-Dichlorobenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane 1,2,4-Trichlorobenzene         1.2 mL @ 2000 µg/ml in ISOOCT   Catalog#: 612-X