Performance of Single Point Monitor in Measuring Ammonia and Hydrogen Sulfide Gases

dc.contributor.author Xin, Hongwei
dc.contributor.author Xin, Hongwei
dc.contributor.author Hoff, Steven
dc.contributor.author Hoff, Steven
dc.contributor.author Kerr, Brian
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T04:21:54.000
dc.date.accessioned 2020-06-29T22:37:48Z
dc.date.available 2020-06-29T22:37:48Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2004
dc.date.embargo 2012-12-14
dc.date.issued 2004-01-01
dc.description.abstract <p>Performance of Single Point Monitors (SPMs) was evaluated for measuring aerial ammonia (NH3, 0 to 30 ppm) and hydrogen sulfide (H2S, 0 to 90 ppb) under laboratory and field conditions. Calibration gas or NH3/H2S-ladden air at various dew-point temperatures (tdp) were introduced simultaneously to the SPMs under evaluation and a chemiluminescence NH3 analyzer or a pulsed-fluorescence H2S analyzer. Coefficient of variation for “as-is” readings among the SPMs, a measurement of unit interchangeability, was up to 15% for H2S and up to 25% for NH3. Linear relationships existed between readings of the SPMs and those of the respective gas analyzer, with the slope increasing with moisture content of the calibration or sample air. Specifically, H2S readings by the SPMs averaged, respectively, 66%, 80%, 87%, and 97% of those by the analyzer for calibration gas at tdp of -22.C (dry), 9.C, 13.C, and 16.C. In comparison, NH3 readings by the SPMs averaged 42%, 86%, 102%, and 178% of those by the analyzer for calibration gas at tdp of -22.C, 8.5.C to 10.C, 12.5.C to 14.C, and 16.C to 17.C, respectively. Correctional equations were developed to compensate for the moisture interference effect on SPM readings of both gases. The corrected SPM readings for H2S measurement with an overall correctional equation generally achieved 90% to 107% agreement with the respective analyzer readings. However, such corrections for NH3 measurements proved not as effective (59% to 90% agreement). To improve the quality of H2S data obtained with SPMs moisture content of the sample air should be concurrently measured and moisture compensation can be made using an overall correctional equation.</p>
dc.description.comments <p>This article is from <em><a href="http://elibrary.asabe.org/abstract.asp?aid=17712&t=3&dabs=Y&redir=&redirType=" target="_blank">Applied Engineering in Agriculture</a> </em>20, no. 6 (2004): 863–872.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/188/
dc.identifier.articleid 1180
dc.identifier.contextkey 3538732
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/188
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/927
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/188/Xin_2004_PeformanceSinglePointMonitor.pdf|||Fri Jan 14 21:46:30 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Animal feeding operation
dc.subject.keywords Ammonia
dc.subject.keywords Hydrogen sulfide
dc.subject.keywords Gas sensors
dc.subject.keywords Air quality monitoring
dc.subject.keywords Moisture interference
dc.title Performance of Single Point Monitor in Measuring Ammonia and Hydrogen Sulfide Gases
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 36e0a8ce-fa2e-4df4-9f67-8d1717122650
relation.isAuthorOfPublication 98b46d48-66a2-4458-9b42-8c4aa050664d
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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