This method is for the determination of alcohols from workplace air. The sample is collected using a charcoal tube. After collection the sample is desorbed with 1% 2-butanol in carbon disulfide and analyzed by GC/FID (flame ionization detector). High humidity reduces sampling efficiency.
The working ranges are 16-1000 ppm for ethanol (30 to 1900 mg/m³) for a 1 L air sample; 4-400 ppm for isopropyl alcohol (10 to 1000 mg/m³) for a 3 L air sample; 1-100 ppm for tert-butyl alcohol (3 to 300 mg/m³) for a 10 L air sample.
NOTE: This method combines and replaces Methods S56, S65, and S63.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in the method. |
| Preservatives: | The method recommends to keep the samples cool and to store them in a freezer. |
| Required Preps: | Charcoal tube, 100 mg/50 mg (SKC 226-01) |
| Collection Method: | The method recommends a 0.01 - 0.2 L/min. flow rate with a 0.1 - 10L sample volume. Note this can vary by analyte. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
1400
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Ethanol | C2H6O |
64-17-5 |
0.01 |
mg |
| Isopropyl alcohol | C3H8O |
67-63-0 |
0.01 |
mg |
| tert-Butyl alcohol | C4H10O |
75-65-0 |
0.01 |
mg |
* 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.