This method is for the collection and analysis of 1-methoxy-2-propanol (1M2P), 2-methoxy-1-propanol (2M1P), 1-methoxy-2-propyl acetate (1M2PA), and 2-methoxy-1-propyl acetate (2M1PA). The sample is collected on a coconut shell charcoal tube. After collection, the sample is desorbed with 95/5 (v/v) methylene chloride/methanol and analyzed by GC/FID (flame ionization detector).
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Recoveries for all compounds were above 91% when stored for 15 days at ambient (20-25°C) or refrigerated (0°C) temperatures. |
| Preservatives: | Samples for 1M2PA and 2M1PA should be refrigerated upon receipt by the laboratory to minimize hydrolysis. Other samples should be stored at room temperature. |
| Required Preps: | Coconut shell charcoal tube, 50/100mg (SKC 226-01) |
| Collection Method: | The method recommends a 0.1 L/min. flow rate and a 10L sample collection volume. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
099
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Propylene glycol monomethyl ether | C4H10O2 |
107-98-2 |
0.73 |
µg |
| Propylene glycol monomethyl ether acetate | C6H12O3 |
108-65-6 |
1.1 |
µg |
| 2-Methoxy-1-propanol | C4H10O2 |
1589-47-5 |
0.75 |
µg |
| 2-Methoxy-1-propyl acetate | C6H12O3 |
70657-70-4 |
1.1 |
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.