This method describes the sample collection and analysis of ethyl alcohol. Samples are collected by drawing air through two Anasorb 747 sampling tubes connected in series. The front tube contains 400 mg of adsorbent, and the back tube 200 mg. The samples are desorbed with a 60:40 N,N-dimethyl-formamide:carbon disulfide solution and analyzed by GC using a flame ionization detector. The air sampler must be separated into its 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: | Recoveries of greater than 102% were obtained from samples stored for up to 16 days at ambient (23°C) and refrigerated (5°C) temperatures. |
| Preservatives: | Store at room temperature or refrigerated. |
| Required Preps: | Two Anasorb 747 tubes in series: 400 mg and 200 mg, 11cm x 8mm OD x 6mm ID |
| Collection Method: | Anasorb 747: 12 L at 0.05 L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
100
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Ethanol | C2H6O |
64-17-5 |
15.52 |
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.