The samples are derivatized with HBr and treated with sodium carbonate.
Analysis is done by gas chromatography with an electron capture detector.
This method has been subjected to the established evaluation procedures of the Organic Methods Evaluation Branch. Analytical Laboratory Salt Lake City, Utah 2. Sampling Procedure 2.1. The adsorbing section contains 100 mg of charcoal, the backup section 50 mg. A 3-mm portion of urethane foam is placed between the outlet end of the tube and the backup section.