Dense Nonaqueous Phase Liquids (DNAPLs)
Detection and Site Characterization
- Overview
- Policy and Guidance
- Chemistry and Behavior
- Environmental Occurrence
- Toxicology
- Detection and Site Characterization
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- Treatment Technologies
- Conferences and Seminars
- Additional Resources
Halogenated Alkanes
Bromodichloromethane
Bromodichloromethane (BDCM) is a volatile halogenated organic and as such is subject to most standard characterization and analytical techniques used on this class of chemicals. Methods such as vertical profiling, membrane interface probe, and standard GC/MS are discussed in the main section for DNAPLs detection and site characterization.
While diffusion samplers have been used mostly for chlorinated ethenes and BTEX, they have been found to work for BDCM (ITRC 2004).
Standard Laboratory Methods
Analysis of BDCM can be performed using standard analyses such as 8021b, 8260c, 8260b, and 8261a.
Field Screening Methods
Given its Henry's Constant, BDCM should be detectable using headspace analysis with a field GC. Standards should be run to verify detection limit requirements. The photoionization energy for BDCM is 10.88 eV (HNU 1997). If a PID detector is used, then the lamp must be 11.7 eV.
No BDCM-specific detection equipment was found.
References
Photoionization Characteristics of Selected Compounds
HNU Systems, Inc., 12 pp, 1997
Technical and Regulatory Guidance for Using Polyethylene Diffusion Bag Samplers to Monitor Volatile Organic Compounds in Groundwater
Interstate Technology & Regulatory Council (ITRC), DSP-3, 78 pp, 2004
Test Methods for Evaluating Solid Waste, Physical/Chemical Methods
U.S. EPA, SW-846 on line.
