This method describes the sample collection and analysis of methyl alcohol. A sample is collected by drawing air through two Anasorb 747 sampling tubes which have been connected in series. The samples are desorbed with a carbon disulfide/dimethyl formamide solution and analyzed by gas chromatography with FID detection. The air sampler must be separated into its two component sampling tubes as soon as possible after sampling. This will prevent post-sampling migration.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Up to 18 days. |
| Preservatives: | Store at room temperature. |
| Required Preps: | Two Anasorb 747 sampling tubes connected in series with a 1-in. length of 1/4-in. ID silicone tubing. 8mmOD x 6mmID containing 400mg and 200mg of adsorbent. |
| Collection Method: | Anasorb sampling tubes: 5 L at 0.05 L/min when RH is more than 50% at 25°C ; 3 L at 0.05 L/min when RH is less than 50% at 25°C. |
| Analytical Methodology: | GC/FID. |
| Documentation: | 
091
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Methanol | CH4O |
67-56-1 |
0.93 |
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.