This method is used to determine the concentration of gasoline range organics in water and soil. This corresponds to an alkane range of C6-C10 and a boiling point range between approximately 60 and 170° Celsius. Gasoline or other specific petroleum products may be identified by the use of pattern recognition. Water or low level soil samples can be analyzed directly for gasoline range organics by purge-and-trap extraction and gas chromatography. High level soil or waste samples are dispersed in methanol to dissolve the volatile organic constituents. A portion of the methanolic solution is analyzed by purge-and-trap GC following the normal water method.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 14 days from collection to analysis |
| Preservatives: | Refrigerate at 4° after collection. Water samples should be preserved with 200 µL of 50% HCl. |
| Required Preps: | Use VOC vials for waters and SVOC jars for solids |
| Collection Method: | Water samples should be collected in triplicate in 40mL VOA vials containing 200 uL of 50% HCl. Soil samples should be collected in a 4 oz. Wide mouth glass jar. Headspace should be minimized to the extent possible for both water and soil samples. |
| Analytical Methodology: | GC-FID |
| Documentation: | 
TN-GRO
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Gasoline Range Organics | 0.1 |
mg/L | ||
* 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.