Dense Nonaqueous Phase Liquids (DNAPLs)
Detection and Site Characterization
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Halogenated Monoaromatics
Diffusion samplers can be used to sample halogenated alkanes in water. Halogenated alkanes are volatile; therefore, diffusion sampling devices also should be effective for most of these chemicals in soil gas.
Most of the halogenated monoaromatics can be detected using standard SW-846 volatile organic methods or Contract Laboratory Program methods. The dichlorobenzenes and 1,2,4-trichlorobenzene also are target compounds for SW-846 Method 8270 (semivolatiles).
Field GC and GC/MS are appropriate for most of the halogenated benzenes. Standards should be run to verify detection limits.
Chloro- and diclorobenzenes are detectable using instruments that have a photoionization detector (PID). A 9.5 eV or 10.2 eV lamp should give good results.
A detection tube is available for chlorobenzene; however, other chlorinated hydrocarbons can interfere in its detection.
Proceed to "Halogenated monoaromatics > Chlorobenzene"
Return to "Halogenated alkenes Introduction"
