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dc.contributor.authorZhou, M
dc.contributor.authorLi, T
dc.contributor.authorZu, M
dc.contributor.authorZhang, S
dc.contributor.authorLiu, Y
dc.contributor.authorZhao, H
dc.date.accessioned2020-12-17T04:55:26Z
dc.date.available2020-12-17T04:55:26Z
dc.date.issued2021
dc.identifier.issn0925-4005
dc.identifier.doi10.1016/j.snb.2020.128905
dc.identifier.urihttp://hdl.handle.net/10072/400339
dc.description.abstractThe majority of water utilities currently employ the in-lab tests of the grabbed samples to determine the free chlorine (FC) residual levels. Under certain circumstances, such approaches are inadequate to timely and accurately reflect the dynamically changed FC residual levels, leading to inappropriate dosages. This work reports a uniquely configured membrane-based colorimetric flow-injection system (MCFIS) capable of accurately and reliably online monitoring drinking water FC residual levels in a rapid (1−5 min per measurement) fashion. The embedded gas-permeable membrane makes MCFIS an interference-free FC monitoring system. The developed pre-calibration strategy avoids the need for on-going calibration. The accuracy of the conventional analytical principles is almost exclusively determined by the absolute analytical signal value of one measurement data point, and any errors from such a single-data point measurement will be directly transferred to the result, which induces uncertainties, hence, poor accuracy and reliability. Differing distinctively from such conventional analytical principles, MCFIS quantifies chlorine concentration based on N, N-diethyl-p-phenylenediamine – Cl2 colorimetric reaction-controlled membrane transport process that enables the determination of gaseous chlorine concentration according to multiple measurement data points to greatly enhance the accuracy and reliability. The inherent analytical features of this slope-based signal quantification principle, interference-free and on-going calibration-free empower MCFIS with an enormous superiority over other systems for online FC monitoring applications.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom128905
dc.relation.ispartofjournalSensors and Actuators, B: Chemical
dc.relation.ispartofvolume327
dc.subject.fieldofresearchOptical Physics
dc.subject.fieldofresearchAnalytical Chemistry
dc.subject.fieldofresearchMaterials Engineering
dc.subject.fieldofresearchcode0205
dc.subject.fieldofresearchcode0301
dc.subject.fieldofresearchcode0912
dc.titleMembrane-based colorimetric flow-injection system for online free chlorine monitoring in drinking water
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationZhou, M; Li, T; Zu, M; Zhang, S; Liu, Y; Zhao, H, Membrane-based colorimetric flow-injection system for online free chlorine monitoring in drinking water, Sensors and Actuators, B: Chemical, 2021, 327, pp. 128905
dc.date.updated2020-12-17T04:49:55Z
gro.hasfulltextNo Full Text
gro.griffith.authorLi, Tianling
gro.griffith.authorZu, Meng
gro.griffith.authorZhao, Huijun
gro.griffith.authorZhang, Shanqing


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