This method is designed to determine the chemical composition of reformed gases and gaseous mixtures by GC-TCD (thermal conductivity detector). This method is also commonly referred to as the fixed gas method. H2, O2, N2, CH4, CO, CO2, ethane, ethylene, also known as atmospheric gases, can be determined by this method. Typical detection limits are 1% (10,000 ppm).
Tedlar bags and Summa cans are most commonly used for sample collection. However, fixed gases are often determined in ground water samples and leachates from landfills.
This method is closely related to ASTM D1945 (chemical composition of natural gas) also referred to as a fixed gas method.
No Obligation Quotation for Analytical Services
If you would like us to provide a quote for laboratory analysis, just provide us with as much information as you can about your project (the more, the better) and we'll provide you a quote via email. As you are searching or browsing our Analytical Guide, you'll see the Request-A-Quote icon... just click on it to start the request process.
| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in method. |
| Preservatives: | None |
| Required Preps: | Dependent upon collection method: Tedlar bag, Summa can. |
| Collection Method: | Various methods can be used for collection. Tedlar bags are the most common. Summa cans are also acceptable. |
| Analytical Methodology: | GC-TCD (thermal conductivity detector) |
| Documentation: | |
| SKU | Item | Price | |
|---|---|---|---|
| TB | Sampling Bags: Air Sampling Bags | $ Call for Price | |
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Carbon dioxide | CO2 |
124-38-9 |
10000 |
ppm |
| Hydrogen | H2 |
1333-74-0 |
10000 |
ppm |
| Carbon monoxide | CO |
630-08-0 |
10000 |
ppm |
| Methane | CH4 |
74-82-8 |
10000 |
ppm |
| Ethane | C2H6 |
74-84-0 |
10000 |
ppm |
| Ethylene | C2H4 |
74-85-1 |
10000 |
ppm |
| Nitrogen | N2 |
7727-37-9 |
10000 |
ppm |
| Oxygen | O2 |
7782-44-7 |
10000 |
ppm |
* 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.