抄録
Two different analytical procedures for the determination of ethylene oxide (ETO) in ambient air were examined to ensure their accuracy and reliability. The first method employed a stainless steel canister (6l), and the second method, presented by the Japan Environment Agency (JEA), used an adsorbent tube impregnated with hydrobromic acid, which converts ETO to 2-bromoethanol. The recovery, relative standard deviation and quantification limit of ETO by canister method were 102 %, 7.8 % (n = 5) and 0.02μg/m3, respectively. While there isn't any unique ion for selected ion monitoring (SIM) by the canister method, and 2-bromoethanol derived from ETO couldn't be separated from the original one by the JEA method. Both results were in fair agreement when applying these two methods to real field measurements. This indicates that both methods can be practically applied to ETO monitoring in ambient air, and the canister method can be used for ETO monitoring simultaneously with volatile organic compounds (VOCs) such as benzene.
