555 Ethylene Oxide Monitor
Associated Analytical Methods: ASTM D5578, similar to OSHA 50
The ethylene oxide monitor is an easy method to sample for either 15 minute STEL or full shift 8 hour exposures. Ethylene oxide is collected on a flexible, inert charcoal wafer treated with hydrogen bromide. The hydrogen bromide converts ethylene oxide to 2-bromoethanol. At the lab, the excess hydrogen bromide is neutralized with sodium carbonate. Then, the 2-bromoethanol is extracted with 90/10 toluene/acetonitrile and analyzed by GC/ECD. No further derivatization is required.
Before sampling, store and ship at room temperature.
After sampling, store and ship at room temperature. Return to the lab within 14 days of sampling.
The 555 ethylene oxide badge may be used for:
- 15 minute, STEL sampling
- 8 hour, TWA sampling
- 24 hour, IAQ sampling
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