This method is for the determination of methanol emissions from stationary sources. The sampling train consists of an unheated probe, midget impinger containing 20mL of deionized water, and silica gel tube (500/260mg). An optional empty impinger may be placed in front of the first water impinger to act as a condensate trap. After collection, the sampling train is rinsed with water and combined with the impinger contents.
The laboratory determines methanol from the impinger contents and silica gel tube using GC/FID. The silica gel tube is desorbed with n-propanol. The total concentration of methanol emissions is equal to the sum of the methanol found in the impinger contents and silica gel tube.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in method. |
| Preservatives: | Keep impinger contents and silica gel tube chilled (recommended 4°C) after collection. |
| Required Preps: | Silica gel tube and deionized, distilled water impinger solution |
| Collection Method: | Sampling train (probe, midget impinger, silica gel tube) following Method 308 procedures. |
| Analytical Methodology: | GC/FID (flame ionization detector) |
| Documentation: | 
308
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Methanol | CH4O |
67-56-1 |
10 |
ug |
* 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.