Water quality - Determination of highly volatile halogenated hydrocarbons - Gas-chromatographic methods
This International Standard specifies two methods for the determination of highly volatile halogenated hydrocarbons using gas chromatography.
Section 2 specifies a method for the determination by liquid/liquid extraction of highly volatile halogenated hydrocarbons in drinking water, ground water, swimming pool water, most rivers and lakes and many sewage and industrial effluents. Typical values of “quantification limits” are given in table 1.
| Table 1 - Typical values of “quantification limits” for some highly volatile halogenated hydrocarbons using liquid/liquid extraction | |
|---|---|
| Compound | Quantification limits μg/l |
| Dichloromethane | 50 |
| Chloroform | 0,05-0,3 |
| Carbon tetrachloride | 0,01-0,1 |
| 1,1-Dichloroethane | 1,0-5 |
| 1,2-Dichloroethane | 5-10 |
| 1,1,1-Trichloroethane | 0,02-0,1 |
| 1,1,2,2-Tetrachloroethane | 0,05-0,1 |
| Hexachloroethane | 0.01-0.05 |
| cis-1,2-Dichloroethylene | 5-50 |
| trans-1,2-Dichloroethvlene | 1-10 |
| Trichloroethylene | 0,05-0,1 |
| Tetrachloroethvlene | 0,1 |
| Hexachlorobutadiene | 0,01 |
| Tribromomethane | 0,1 |
| 1,1,2-Trichlorotrifluoroethane | 0,1 |
Section 3 specifies a method for the determination of highly volatile halogenated hydrocarbons in drinking water, surface waters and ground water by a static headspace method. Typical values of “quantification limits” are given in table 2.
In practise, the head-space method is applicable for industrial effluents as a screening method, but in some cases it is necessary to confirm the result by the liquid-liquid extraction method.
| Table 2 - Typical values of “quantification limits” for some highly volatile halogenated hydrocarbons using static head-space method | |
|---|---|
| Compound | Quantification limits μg/l |
| Dichloromethane | 50 |
| Chloroform | 0,3 |
| Carbon tetrachloride | 0,1 |
| 1,1-Dichloroethane | 100 |
| 1,2-Dichloroethane | 100 |
| 1,1,1-Trichloroethane | 0,1 |
| 1,1,2-Trichloroethane | 20 |
| 1,1-Dichloroethylene | 10 |
| cis-1,2-Dichloroethylene | 50 |
| trans-1,2-Dichloroethvlene | 25 |
| Trichloroethylene | 0,2 |
| Tetrachloroethvlene | 0,2 |
| 1,2-Dichloropropane | 50 |
| 1,3-Dichloropropane | 200 |
| cis+trans-1,3-Dichloropropylene | 10 |
| Di bromomethane | 0,3 |
| Tribromomethane (Bromoform) | 5 |
| 1,2-Dibromoethane | 12 |
| Bromochloromethane | 1 |
| Bromodichloromethane | 0,2 |
| Dibromochloromethane | 0,3 |
| 1,1,3-Trifluoroethane | 1 |
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