Performance of Single Point Monitors for Measuring Aerial Ammonia and Hydrogen Sulfide

dc.contributor.author Xin, Hongwei
dc.contributor.author Liang, Yi
dc.contributor.author Hoff, Steven
dc.contributor.author Xin, Hongwei
dc.contributor.author Hoff, Steven
dc.contributor.author Richard, Tom
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T04:24:10.000
dc.date.accessioned 2020-06-29T22:32:11Z
dc.date.available 2020-06-29T22:32:11Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2004
dc.date.embargo 2012-12-14
dc.date.issued 2004-08-01
dc.description.abstract <p>Performance of 43-44 Single Point Monitors (SPMs) was evaluated for measuring aerial ammonia (NH3, 0-30 ppm) and hydrogen sulfide (H2S, 0-90 ppb) under laboratory and field conditions. Calibration gas or sample air with various levels of moisture content or dew-point temperature (tdp) and gas concentrations were introduced simultaneously to the SPMs and a reference gas analyzer – chemiluminescence analyzer for NH3 and pulsed-fluorescence analyzer for H2S. Linear relationships were observed between readings of the SPMs and those of the respective reference analyzer, which were influenced by moisture content or tdp of the calibration or sample air. Specifically, average H2S readings by the SPMs were, respectively, 66%, 80%, 87% and 97% of those by the reference analyzer for calibration gas at tdp of -22 (dry), 9, 13 and 16 ºC. In comparison, average NH3 readings by the SPMs were 42%, 86%, 102% and 178% of those by the reference analyzer for calibration gas at tdp of -22, 8.5-10, 12.5-14, and 16-17 ºC respectively. Coefficient of variation of “as-is” readings among the tested SPMs was up to 15% for H2S and up to 25% for NH3. Regression equations were developed to compensate for the moisture effect on SPM readings of both gases. The correctional regression equations were able to achieve over 90% of the reference H2S readings; however, such equations were not as effective in predicting or correcting NH3 readings by the SPMs.</p>
dc.description.comments <p>This is an ASAE Meeting Presentation, Paper No. <a href="http://elibrary.asabe.org/abstract.asp?aid=16801&t=3&dabs=Y&redir=&redirType=" target="_blank">044109</a>.</p>
dc.identifier archive/lib.dr.iastate.edu/abe_eng_conf/182/
dc.identifier.articleid 1189
dc.identifier.contextkey 3538882
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_conf/182
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/186
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_conf/182/Xin_2004_PerformanceSinglePoint.pdf|||Fri Jan 14 21:38:13 UTC 2022
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Animal feeding operation
dc.subject.keywords air quality monitoring
dc.subject.keywords single point monitor
dc.subject.keywords moisture interference
dc.title Performance of Single Point Monitors for Measuring Aerial Ammonia and Hydrogen Sulfide
dc.type article
dc.type.genre conference
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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