This method is for the determination of n-butane from workplace air. The sample is collected on two Carbosieve S-III tubes in series, desorbed with carbon disulfide, and analyzed by GC/FID (flame ionization detector). This is a partially evaluated method.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 7 days from sample collection to analysis per the storage study. |
| Preservatives: | The method recovery study was > 84% when stored at ambient temperature and > 96% when stored a5 -5°C. |
| Required Preps: | Charcoal tube, 100mg/50mg (SKC 226-01) |
| Collection Method: | The method recommends a 0.05 L/min. flow rate and a 3L sample collection volume. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
PV2010
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Butane | C4H10 |
106-97-8 |
0.79 |
ppm |
* 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.