This method is for the determination of methyl cyclohexanone. The sample is collected on sorbent Porapak Q tubes, desorbed in 1mL acetone, and analyzed by GC/FID. The working range is 100 to 800 mg/m³ (20 to 170 ppm) for a 5 L air sample. This method was developed for the 3- and 4-methylcyclohexanones. 2-Methylcyclohexanone is not of major commercial importance and has not been tested with this method. The use of a capillary column would give better sensitivity, however, all the isomers may not elute as a single peak. NOTE: This method revises Method S375.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Up to 7 days from sampling to analysis if kept at 25°C |
| Preservatives: | Store at room temperature (25°C). |
| Required Preps: | Solid sorbent tubes: Porapak Q, 150 mg/75 mg, 8.5cm x 6mm OD x 4mm ID |
| Collection Method: | Solid sorbent tubes: 1 - 6 L @ 0.01 - 0.05 L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
2521
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Methyl Cyclohexanone (Mixture of Isomers) | 1331-22-2 |
0.09 |
mg | |
| 2-Methylcyclohexanone | C7H12O |
583-60-8 |
0.09 |
mg |
| 4-Methylcyclohexanone | C7H12O |
589-92-4 |
0.09 |
mg |
| 3-Methylcyclohexanone | C7H12O |
591-24-2 |
0.09 |
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.