Method | EPA Method 502.2 |
---|---|
Title | VOLATILE ORGANIC COMPOUNDS IN WATER BY PURGE AND TRAPCAPILLARY COLUMN GAS CHROMATOGRAPHY WITH PHOTOIONIZATION ANDELECTROLYTIC CONDUCTIVITY DETECTORS IN SERIES |
Abstract | Highly volatile organic compounds with low water solubility are extracted (purged) from the sample matrix by bubbling an inert gas through a 5 mL aqueous sample. Purged sample components are trapped in a tube containing suitable sorbent materials. When purging is complete, the sorbent tube is heated and backflushed with helium to desorb trapped sample components onto a capillary gas chromatography (GC) column. The column is temperature programmed to separate the method analytes which are then detected with a photoionization detector (PID) and a halogen specific detector placed in series. Tentative identifications are confirmed by analyzing standards under the same conditions used for samples and comparing resultant GC retention times. Additional confirmatory information can be gained by comparing the relative response from the two detectors. Each identified component is measured by relating the response produced for that compound to the response produced by a compound that is used as an internal standard. Absolute confirmation, a gas chromatography/mass spectrometry(GC/MS) determination according to method 524.1 or method 524.2 is recommended. |
CAS # | Compound Name |
---|---|
71-43-2 | Benzene |
108-86-1 | Bromobenzene |
74-97-5 | Bromochloromethane |
75-27-4 | Bromodictiloromethane |
75-25-2 | Bromoform |
74-83-9 | Bromomethane |
104-51-8 | n-Butylbenzene |
135-98-8 | sec-Butylbenzene |
98-06-6 | tert-Butylbenzene |
56-23-5 | Carbon tetrachloride |
108-90-7 | Chlorobenzene |
75-00-3 | Chloroethane |
67-66-3 | Chloroform |
74-87-3 | Chloromethane |
95-49-8 | 2-Chlorotoluene |
106-43-4 | 4-Chlorotoluene |
124-48-1 | Dibromochloromethane |
96-12-8 | 1,2-Dibromo-3-chloropropane |
106-93-4 | 1,2-Dibromoethane |
74-95-3 | Dibromomethane |
95-50-1 | 1,2-Dichlorobenzene |
541-73-1 | 1,3-Dichlorobenzene |
106-46-7 | 1,4-Dichlorobenzene |
75-71-8 | Dichlorodifluoromethane |
75-34-3 | 1,1-Dichloroethane |
107-06-2 | 1,2-Dichloroethane |
75-34-3 | 1,1-Dichloroethene |
156-59-2 | cis-1,2-Dichloroethene |
156-60-5 | trans-1,2-Dichloroethene |
78-87-5 | 1,2-Dichloropropane |
142-28-9 | 1,3-Dichloropropane |
594-20-7 | 2,2-Dichloropropane |
563-58-6 | 1,1-Dichloropropene |
10061-01-5 | cis-1,3-Dichloropropene |
10061-02-6 | trans-1,3-Dichloropropene |
100-41-4 | Ethylbenzene |
87-68-3 | Hexachlorobutadiene |
98-82-8 | Isopropylbenzene |
99-87-6 | 4-Isopropyltoluene |
75-09-2 | Methylene chloride |
91-20-3 | Naphthalene |
103-65-1 | Propylbenzene |
100-42-5 | Styrene |
630-20-6 | 1,1,1,2-Tetrachloroethane |
79-34-5 | 1,1,2,2-Tetrachloroethane |
127-18-4 | Tetrachloroethene |
108-88-3 | Toluene |
87-61-6 | 1,2,3-Trichlorobenzene |
120-82-1 | 1,2,4-Trichlorobenzene |
71-55-6 | 1,1,1-Trichloroethane |
79-00-5 | 1,1,2-Trichloroethane |
79-01-6 | Trichloroethene |
75-69-4 | Trichlorofluoromethane |
96-18-4 | 1,2,3-Trichloropropane |
95-63-6 | 1,2,4-Trimethylbenzene |
108-67-8 | 1,3,5-Trimethylbenzene |
75-01-4 | Vinyl chloride |
95-47-6 | o-Xylene |
108-38-3 | m-Xylene |
106-42-3 | p-Xylene |