This method is for the determination of difluorodibromomethane. The sample is collected on charcoal sorbent tubes, desorbed in 1.0 mLof 2-propanol and allowed to stand overnight. The sample is then analyzed using GC/FID. The working range is 200 to 2000 mg/m³(23 to 230 ppm) for a 10 L air sample. Difluorodibromomethane is used in the synthesis of dyes, pharmaceuticals, and quaternary ammonium compounds, and as a fire extinguishing agent. Note: This is Method S107 in a revised format.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Not noted in method |
| Preservatives: | Not noted in method |
| Required Preps: | Solid sorbent tubes: 2 tandem coconut charcoal tubes in series, each 150 mg, 7cm x 6mm OD x 4mm ID |
| Collection Method: | Solid sorbent tube: 2.5 - 10 L @ 0.01 - 0.2 L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
1012
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Difluorodibromomethane | CBr2F2 |
75-61-6 |
0.4 |
mg |
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.