Evaluation Of OSHA Method No. 30 For Ethylene Oxide In Air With 400- mg/200-mg Charcoal Tubes.
NIOSH 1984 Feb:15 pages
An analytical procedure based on OSHA method Number 30 for the determination of ethylene-oxide (75218) (EO) was described. The method utilized sampling tubes containing 400 milligrams (mg) of charcoal in the front section and 200mg in the back sections instead of 100mg in the front and 50mg in the rear as in the OSHA method. The sample was then desorbed from the charcoal with 3 milliliters of a 99 to 1 benzene/carbon-disulfide solution. One milliliter of the solution was transferred to another vessel to which one drop of 48 percent hydrobromic-acid and 0.15 grams of sodium-carbonate were added. This solution converted EO to 2-bromoethanol (540512). One microliter of the sample solution was injected into a gas chromatograph equipped with an electron capture detector along with standards prepared from 2-bromoethanol. Charcoal samples that had been obtained from EO in humid air were stored at room temperature and under refrigeration for up to 28 days before being analyzed. EO migrated from the front sections of the charcoal to the back sections during storage. The authors note that EO at concentrations of 0.027 to at least 1.7 parts per million in 5 liter air samples can be determined.
NIOSH-Author; Analytical-methods; Adsorbents; Chromatographic-analysis; Analytical-chemistry; Ethylenes; Fumigants;
NTIS Accession No.
Division of Physical Sciences and Engineering, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, 15 pages, 8 references