This method is used for the collection and analysis of dimethylacetamide. The sample is collected on a silica gel tube. After collection, the sample is desorbed in 1mL of methanol and analyzed by GC/FID (flame ionization detector). Silica gel has a high affinity for water, therefore, high relative humidity may adversely affect the efficiency of analyte adsorption.
The working range of the method is 10 to 80 mg/m³ for a 50 L air sample.
NOTE: This method combines and replaces Methods S254 and S255.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 5 days from sample collection to analysis if samples are kept at 25°C. |
| Preservatives: | Store samples at 25°C. |
| Required Preps: | Silica gel tube, 75/150mg (SKC 226-10) |
| Collection Method: | The method recommends a 0.01 - 1 L/min. flow rate and a 15 - 80L sample collection volume. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
2004
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| N,N-Dimethylacetamide | C4H9NO |
127-19-5 |
0.05 |
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.