This method is used for the determination of ethylene oxide. The sample is collected on HBr coated petroleum charcoal tubes, followed by desorption in 1mL dimethylformamide. The sample is then analyzed by GC/ECD (Gas Chromatography/Electron Capture Detection). The working range is 0.05 to 4.6 ppm (0.08 to 8.3 mg/m 3 ) for a 24 L air sample. The method is applicable to short-term (10-min) samples. This is a modification of OSHA Method 50 and replaces NIOSH Methods 1607, which has smaller sample capacity, and S286, which is useful for higher levels. Method 3702 (Ethylene Oxide by Portable GC) describes field-readable gas chromatography for the determination of ethylene oxide.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 90% recovery after 17 days from sampling to analysis if kept at 25°C in the dark |
| Preservatives: | Protect from prolonged exposure to light |
| Required Preps: | Solid sorbent tube: HBr-coated petroleum charcoal, 100 mg/50 mg, 4.5 cm X 6 mm OD x 4 mm ID |
| Collection Method: | Solid sorbent tube: 1 - 24 L @ 0.05 to 0.15 L/min. |
| Analytical Methodology: | GC/ECD |
| Documentation: | 
1614
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Ethylene oxide | C2H4O |
75-21-8 |
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.