{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T05:04:38Z","timestamp":1775538278921,"version":"3.50.1"},"reference-count":17,"publisher":"Oxford University Press (OUP)","issue":"6","license":[{"start":{"date-parts":[[2016,11,29]],"date-time":"2016-11-29T00:00:00Z","timestamp":1480377600000},"content-version":"vor","delay-in-days":28,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Occupational Health"],"published-print":{"date-parts":[[2016,11]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>In the use of activated carbon beds as adsorbents for various types of organic vapor in respirator gas filters, water adsorption of the bed and test gas humidity are expected to alter the accuracy in the estimation of breakthrough data. There is increasing interest in the effects of moisture on estimation methods, and this study has investigated the effects with actual breakthrough data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We prepared several activated carbon beds preconditioned by equilibration with moisture at different relative humidities (RH=40%\u201070%) and a constant temperature of 20\u00b0C. Then, we measured breakthrough curves in the early region of breakthrough time for 10 types of organic vapor, and investigated the effects of moisture on estimation using the Wheeler\u2010 Jonas equation, the simulation software NIOSH Multi\u2010 Vapor\u2122 2.2.3, and RBT (Relative Breakthrough Time) proposed by Tanaka <jats:italic>et al.<\/jats:italic><\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The Wheeler\u2010Jonas equation showed good accordance with breakthrough curves at all RH in this study. However, the correlation coefficient decreased gradually with increasing RH regardless of type of organic vapor. Estimation of breakthrough time by MultiVapor showed good accordance with experimental data at RH=50% . In contrast, it showed discordance at high RH (&gt;50%). RBTs reported previously were consistent with experimental data at RH =50%. On the other hand, the values of RBT changed markedly with increasing RH.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The results of each estimation method showed good accordance with experimental data under comparatively dry conditions (RH\u226450%). However, there were discrepancies under high humidified conditions, and further studies are warranted.<\/jats:p><\/jats:sec>","DOI":"10.1539\/joh.15-0244-oa","type":"journal-article","created":{"date-parts":[[2016,9,29]],"date-time":"2016-09-29T22:07:16Z","timestamp":1475186836000},"page":"570-581","source":"Crossref","is-referenced-by-count":6,"title":["Estimation of Organic Vapor Breakthrough in Humidified Activated Carbon Beds: \u2014Application of Wheeler\u2010Jonas Equation, NIOSH MultiVapor\u2122 and RBT (Relative Breakthrough Time)"],"prefix":"10.1093","volume":"58","author":[{"given":"Hironobu","family":"Abiko","sequence":"first","affiliation":[{"name":"Work Environment Research Group National Institute of Occupational Safety and Health Japan (JNIOSH)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mitsuya","family":"Furuse","sequence":"additional","affiliation":[{"name":"Work Environment Research Group National Institute of Occupational Safety and Health Japan (JNIOSH)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tsuguo","family":"Takano","sequence":"additional","affiliation":[{"name":"Department of Human Engineering National Institute of Industrial Health Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2016,11,29]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1080\/0002889768507456"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.2486\/indhealth.48.52"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.2486\/indhealth.MS1041"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1080\/15298668491400197"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1080\/15298668491400205"},{"key":"e_1_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1539\/sangyoeisei.wadai12002"},{"key":"e_1_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1080\/15459620490467792"},{"key":"e_1_2_1_9_1","first-page":"133","volume-title":"Modeling of gaseous adsorption of activated carbon bed by Wheeler\u2010Jonas equation and estimation of breakthrough time using the extended equation","author":"Abiko H","year":"2011"},{"key":"e_1_2_1_10_1","first-page":"185","volume-title":"Evaluation of organic vapor breakthrough time of an activated carbon bed containing moisture by Wood's estimation model using the Wheeler\u2010Jonas equation","author":"Abiko H","year":"2011"},{"key":"e_1_2_1_11_1","unstructured":"The National Personal Protective Technology Laboratory (NPPTL).MultiVapor\u2122 Version 2.2.3 Application. 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