This method describes the sample collection and analysis of 2,4-Dinitrotoluene (DNT) and 2,4,6-Trinitrotoluene (TNT). Samples are collected by drawing known volumes of air through laboratory modified commercial Tenax-GC resin tubes. The modification consists of the placement of an 8-mm glass-fiber filter disc inside the tube, ahead of the first resin bed. The samples are desorbed with acetone and analyzed by gas chromatography using a Thermal Energy Analyzer (TEA) equipped with an Explosives Analysis Package (EAP).
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 19 days. |
| Preservatives: | Store at room temperature. |
| Required Preps: | Modified sampling tube containing Tenax-GC resin, 100mg/50mg, 10cm x 8mmOD. The modification consists of the placement of an 8-mm glass-fiber filter disc inside the tube, ahead of the first resin bed. |
| Collection Method: | Tenax-GC tube: 60 L at 1 L/min. |
| Analytical Methodology: | Gas Chromatography(GC) with a Thermal Energy Analyzer(TEA) with an Explosive Analysis Package (EAP). |
| Documentation: | 
044
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Trinitrotoluene | C7H5N3O6 |
118-96-7 |
1.23 |
µg |
| 2,4-Dinitrotoluene | C7H6N2O4 |
121-14-2 |
1.21 |
µg |
* 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.