Practical method for air sampling and analysis of some natural gas odorant
by Rezvan Zendehdel; Faezeh Abass Gohari; Behjat Jafari Tehrani; Zohre Amini; Majid Mahdian Dehkordi; Hakime Nouri Parkestani; Seyed Mohammad Sadat
International Journal of Oil, Gas and Coal Technology (IJOGCT), Vol. 27, No. 2, 2021

Abstract: In this study, a method was presented for sampling and analysis of co-exposure to gas odorants such as methyl ethyl sulphide (MES), dimethyl sulphide (DMS) and tert-butyl mercaptane (TBM). An impregnated fibre glass with mercuric acetate was used for air sampling of odorants. In this study, odorant assessment was optimised with respect to the mercuric acetate, type of solution for odorant releasing and type of solvent for liquid-liquid extraction. Air sampling simulation was provided by standard preparation in tedlar bag. Odorants were analysed by gas chromatography equipped with mass spectrometry. Odorants released from 7% impregnated filters by 20% hydrochloric acid. MES, DMS and TBM were extracted by dichloroethane. Inter-day and intra-day coefficients variation was found to be lower than 11 by the recovery higher than 94%. According to the results of the recent study, a practical and reliable method was presented for air sampling and analysis of DMS, MES and TBM. [Received: October 8, 2019; Accepted: April 23, 2020]

Online publication date: Tue, 08-Jun-2021

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