This method is for the collection and anlaysis of glycol ethers by GC/FID (flame ionization detector). The glycol ethers validated by this method include propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and propylene glycol monomethyl ether acetate. The sample is collected on an Anasorb 747 tube. After collection the sample is desorbed with 1mL of methylene chloride/methanol (85:15) and analyzed by GC/FID.
The working range for propylene glycol monomethyl ether was 0.041 to 10.0 ppm (0.154 to 36.9 mg/m3), for dipropylene glycol monomethyl ether was 0.050 to 6.19 ppm (0.305 to 37.5 mg/m3), and propylene glycol monomethyl ether acetate was 0.030 to 6.83 ppm (0.151 to 36.9 mg/m3) for a 10 L sample .
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | The sample is stable for 14 days if kept at 5°C for propylene glycol ether and propylene glycol ether acetate; 7 days if kept at 5°C for dipropylene glycol ether. |
| Preservatives: | Store samples at 5°C. |
| Required Preps: | Anasorb 757, 70/140mg (SKC 226-81A) |
| Collection Method: | The method recommends a flow rate of 0.1 - 2 L/min. and a sample collection volume of 3 - 25L. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
2554
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Propylene glycol monomethyl ether | C4H10O2 |
107-98-2 |
0.5 |
µg |
| Propylene glycol monomethyl ether acetate | C6H12O3 |
108-65-6 |
0.5 |
µg |
| Dipropylene glycol methyl ether | 34590-94-8 |
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.