Title: Practical method for air sampling and analysis of some natural gas odorant

Authors: Rezvan Zendehdel; Faezeh Abass Gohari; Behjat Jafari Tehrani; Zohre Amini; Majid Mahdian Dehkordi; Hakime Nouri Parkestani; Seyed Mohammad Sadat

Addresses: Department of Occupational Health and Safety, School of Public Health and Safety, Shahid Beheshti University of Medical Science, Tehran, Iran ' Department of Occupational Health and Safety, School of Public Health and Safety, Shahid Beheshti University of Medical Science, Tehran, Iran ' Department of Occupational Health and Safety, School of Public Health and Safety, Shahid Beheshti University of Medical Science, Tehran, Iran ' Research and Development Department, Chaharmahal and Bakhtaran Province Gas Company, Shahrekord, Iran ' Research and Development Department, Chaharmahal and Bakhtaran Province Gas Company, Shahrekord, Iran ' Department of Occupational Health Safety and Environment, Chaharmahal and Bakhtiari Province Gas Company, Shahrekord, Iran ' Department of Occupational Health and Safety, School of Public Health and Safety, Beheshti University of Medical Science, Tehran, Iran

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]

Keywords: gas odorant; air sampling; method development.

DOI: 10.1504/IJOGCT.2021.115544

International Journal of Oil, Gas and Coal Technology, 2021 Vol.27 No.2, pp.143 - 151

Received: 08 Oct 2019
Accepted: 23 Apr 2020

Published online: 01 Jun 2021 *

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