{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,21]],"date-time":"2026-02-21T12:16:53Z","timestamp":1771676213405,"version":"3.50.1"},"reference-count":22,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2022,10,18]],"date-time":"2022-10-18T00:00:00Z","timestamp":1666051200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"China Southern Power Grid Co., Ltd.","award":["GZKJXM20210348"],"award-info":[{"award-number":["GZKJXM20210348"]}]},{"name":"China Southern Power Grid Co., Ltd.","award":["QianKeHeZhiCheng [2021] General 365"],"award-info":[{"award-number":["QianKeHeZhiCheng [2021] General 365"]}]},{"name":"Science and Technology Support Program of Guizhou Province","award":["GZKJXM20210348"],"award-info":[{"award-number":["GZKJXM20210348"]}]},{"name":"Science and Technology Support Program of Guizhou Province","award":["QianKeHeZhiCheng [2021] General 365"],"award-info":[{"award-number":["QianKeHeZhiCheng [2021] General 365"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>SO2F2 and SOF2 are the main components from the decomposition of insulation gas SF6. Photoacoustic spectroscopy (PAS) has been acknowledged as an accurate sensing technique. Polar material adsorption for SO2F2 and SOF2 in the photoacoustic gas cell of PAS may affect detection efficiency. In this paper, the optical gas-cell dynamic adsorptions of four different materials and the detection effects on SO2F2 and SOF2 are theoretically analyzed and experimentally demonstrated. The materials, including grade 304 stainless steel (SUS304), grade 6061 aluminum alloy (Al6061), polyvinylidene difluoride (PVDC), and polytetrafluoroethylene (PTFE), were applied inside the optical gas cell. The results show that, compared with metallic SUS304 and Al6061, plastic PVDC and PTFE would reduce the gas adsorption of SO2F2 and SOF2 by 10 to 20% and shorten the response time during gas exchange. The complete gas defusing period in the experiment was about 30 s. The maximum variations of the 90% rising time between the different adsorption materials were approximately 3 s for SO2F2 and 6 s for SOF2, while the generated photoacoustic magnitudes were identical. This paper explored the material selection for PAS-based gas sensing in practical applications.<\/jats:p>","DOI":"10.3390\/s22207949","type":"journal-article","created":{"date-parts":[[2022,10,19]],"date-time":"2022-10-19T00:58:51Z","timestamp":1666141131000},"page":"7949","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Optical Gas-Cell Dynamic Adsorption in a Photoacoustic Spectroscopy-Based SOF2 and SO2F2 Gas Sensor"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9059-8928","authenticated-orcid":false,"given":"Ying","family":"Zhang","sequence":"first","affiliation":[{"name":"Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., 251 Jiefang Road Nanming District, Guiyang 550002, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mingwei","family":"Wang","sequence":"additional","affiliation":[{"name":"Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., 251 Jiefang Road Nanming District, Guiyang 550002, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pengcheng","family":"Yu","sequence":"additional","affiliation":[{"name":"Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., 251 Jiefang Road Nanming District, Guiyang 550002, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhe","family":"Liu","sequence":"additional","affiliation":[{"name":"Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., 251 Jiefang Road Nanming District, Guiyang 550002, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s00339-021-05118-z","article-title":"Emission spectrum characteristics of SF6 plasma based on femtosecond laser-guided high-voltage discharge","volume":"128","author":"Zhang","year":"2022","journal-title":"Appl. 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