This method is for the determination of siloxanes from landfill gas. The sample is on an XAD-2 using a flow rate of 250 mL/min. for 40 minutes for a 10L total sample volume. After sample collection, the siloxanes are thermally purged from the tube and analyzed by GC/MS.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified. |
| Preservatives: | None specified. |
| Required Preps: | XAD-2 tube, 400/200mg (SKC 226-30-06) |
| Collection Method: | 250 mL/min. for 40 minutes |
| Analytical Methodology: | GC/MS |
| Documentation: | |
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Hexamethyldisiloxane (L2) | C6H18OSi2 |
107-46-0 |
1 |
µg |
| Octamethyltrisiloxane (L3) | C8H24O2Si3 |
107-51-7 |
1 |
µg |
| Decamethyltetrasiloxane (L4) | C10H30O3Si4 |
141-62-8 |
1 |
µg |
| Hexamethylcyclotrisiloxane (D3) | C6H18O3Si3 |
541-05-9 |
1 |
µg |
| Octamethylcyclotetrasiloxane (D4) | C8H24O4Si4 |
556-67-2 |
1 |
µg |
| Decamethylcyclopentasiloxane (D5) | C10H30O5Si5 |
541-02-6 |
1 |
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.