This method is used for the collection and analysis of carbon dioxide (CO2), methane (CH4), nitrogen (N2), and oxygen (O2) in samples from municipal solid waste landfills and other sources. The collected sample is analyzed by GC/TCD (thermal conductivity detector).
The method does not state any holding times from collection to analysis, however, it is recommended to analyze the samples as soon as possible after collection.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in method |
| Preservatives: | None specified in method |
| Required Preps: | 4, 6, or 8 Liter stainless steel canister |
| Collection Method: | Collected using a probe, rotameter and pump following procedures in EPA Methods 3 or 25C. |
| Analytical Methodology: | GC/TCD (thermal conductivity detector) |
| Documentation: | 
3C
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Carbon dioxide | CO2 |
124-38-9 |
1 |
% |
| Methane | CH4 |
74-82-8 |
1 |
% |
| Nitrogen | N2 |
7727-37-9 |
1 |
% |
| Oxygen | O2 |
7782-44-7 |
1 |
% |
* 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.