| Method | EPA Method 503.1 |
|---|---|
| Title | VOLATILE AROMATIC AND UNSATURATED ORGANIC COMPOUNDS INWATERBY PURGE AND TRAP GAS CHROMATOGRAPHY |
| Abstract | Highly volatile organic compounds with low water solubility are extracted (purged) from a 5-mL sample by bubbling an inert gas through the aqueous sample. Purged sample components are trapped in a tube containing a suitable sorbent material. When purging is complete, the sorbent tube is heated and backflushed with an inert gas to desorb trapped sample components onto a gas chromatography (GC) column. The gas chromatograph is temperature programmed to separate the method analytes which are then detected with a photoionization detector. A second chromatographic column is described that can be used to help confirm GC identifications or resolve coeluting compounds. Analyses may be performed by gas chromatography/mass spectrometry (GC/MS) according to Method 524.1 or Method 524.2. |
| CAS # | Compound Name |
|---|---|
| 71-43-2 | Benzene |
| 108-86-1 | Bromobenzene |
| 104-51-8 | n-Butylbenzene |
| 135-98-8 | sec-Butylbenzene |
| 98-06-6 | tert-Butylbenzene |
| 108-90-7 | Chlorobenzene |
| 95-49-8 | 2-Chlorotoluene |
| 106-43-4 | 4-Chlorotoluene |
| 95-50-1 | 1,2-Dichlorobenzene |
| 541-73-1 | 1,3-Dichlorobenzene |
| 106-46-7 | 1,4-Dichlorobenzene |
| 100-41-4 | Ethylbenzene |
| 87-68-3 | Hexachlorobutadiene |
| 98-82-8 | Isopropylbenzene |
| 99-87-6 | 4-Isopropyltoluene |
| 91-20-3 | Naphthalene |
| 103-65-1 | n-Propylbenzene |
| 100-42-5 | Styrene |
| 127-18-4 | Tetrachloroethene |
| 108-88-3 | Toluene |
| 87-61-6 | 1,2,3-Trichlorobenzene |
| 120-82-1 | 1,2,4-Trichlorobenzene |
| 79-01-6 | Trichloroethene |
| 95-63-6 | 1,2,4-Trimethylbenzene |
| 108-67-8 | 1,3,5-Trimethylbenzene |
| 95-47-6 | o-Xylene |
| 108-38-3 | m-Xylene |
| 106-42-3 | p-Xylene |