This method is used for the determination of N-methyl-2-pyrrolidine. The sample is collected on charcoal sorbent tubes and desorbed with 95:5 methylene chloride:methanol. The sample is then analyzed by GC (gas chromatography) and detected by NPD (nitrogen phosphorous detector) or FID (flame ionization detector). Under the GC parameters given in the method N-methyl-2-pyrrolidinone can be identified based upon retention time and quantified. NOTE: This method represents an improvement over an OSHA In-House method for N-methyl-2-pyrrolidone. Method 1302 employs a shorter capillary column, improved sensitivity and recovery at lower sample levels, and a choice of two detection systems.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 14 days from sampling to analysis if kept at 5°C |
| Preservatives: | Store at 5°C and protect from prolonged exposure to light. |
| Required Preps: | Solid sorbent tube: coconut shell charcoal, 100 mg / 50 mg tube, 7 cm x 6 mm OD x 4 mm ID |
| Collection Method: | Solid sorbent tube: 0.5 - 125 L @ 0.05 - 0.2 L/min. |
| Analytical Methodology: | GC/FID or GC/NPD |
| Documentation: | 
1302
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| 1-Methyl-2-pyrrolidinone | C5H9NO |
872-50-4 |
0.3 |
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.