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Article: Determination of carbon monoxide in ambient air using piezoelectric crystal sorption detection

TitleDetermination of carbon monoxide in ambient air using piezoelectric crystal sorption detection
Authors
KeywordsCarbon monoxide
Chemical sensor
Non-reversible interaction
Piezoelectric quartz crystal
Issue Date2002
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/aca
Citation
Analytica Chimica Acta, 2002, v. 456 n. 2, p. 227-239 How to Cite?
AbstractA new piezoelectric quartz crystal (PQC) sorption detector was developed to monitor carbon monoxide (CO) at sub-ppm level in ambient air. Out of the 28 coating materials studied, the palladium(II) acetamide complex with a 1:10mole ratio of Pd(II) to acetamide was found to be the best. The detection is based on a non-reversible gas/coating interaction with sensitivity depending on gas flowrate. For 5-15min exposure at a flowrate of 50ml/min, the working ranges were found to vary from 0.7 to 40ppm (total exposure from 8 to 160μg CO) and detection limits (S/N=2) from 0.7 to 2ppm CO (total exposure to 8μg CO). The repeatability at 10ppm CO was 11.8% (R.S.D. for n=3). The sensor lifetime was found dependent on exposure up to 160μg CO or not exceeding 1000Hz accumulative shift of frequency to avoid saturation of active sites at the crystal surface. No interference to CO detection was found for H 2, H 2S, SO 2, NO 2, CO 2, HCHO, gasoline and water vapors at concentrations much higher than ambient air. Compared to existing CO monitor, the PQC detector developed has advantages of adequate selectivity, high sensitivity, fast response and a much lower detection limit for detecting CO at sub-ppm levels. However, it is limited by the total exposure to a maximum of 160μg CO that restricts its application to intermittent monitoring of low CO concentration. The present work has demonstrated the advantages of using strong non-reversible interaction to enhance PQC sensitivity, as the total exposure can be adjusted easily by a suitable control of the gas flowrate. © 2002 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/69026
ISSN
2015 Impact Factor: 4.712
2015 SCImago Journal Rankings: 1.548
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFung, YSen_HK
dc.contributor.authorWong, CCWen_HK
dc.date.accessioned2010-09-06T06:09:52Z-
dc.date.available2010-09-06T06:09:52Z-
dc.date.issued2002en_HK
dc.identifier.citationAnalytica Chimica Acta, 2002, v. 456 n. 2, p. 227-239en_HK
dc.identifier.issn0003-2670en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69026-
dc.description.abstractA new piezoelectric quartz crystal (PQC) sorption detector was developed to monitor carbon monoxide (CO) at sub-ppm level in ambient air. Out of the 28 coating materials studied, the palladium(II) acetamide complex with a 1:10mole ratio of Pd(II) to acetamide was found to be the best. The detection is based on a non-reversible gas/coating interaction with sensitivity depending on gas flowrate. For 5-15min exposure at a flowrate of 50ml/min, the working ranges were found to vary from 0.7 to 40ppm (total exposure from 8 to 160μg CO) and detection limits (S/N=2) from 0.7 to 2ppm CO (total exposure to 8μg CO). The repeatability at 10ppm CO was 11.8% (R.S.D. for n=3). The sensor lifetime was found dependent on exposure up to 160μg CO or not exceeding 1000Hz accumulative shift of frequency to avoid saturation of active sites at the crystal surface. No interference to CO detection was found for H 2, H 2S, SO 2, NO 2, CO 2, HCHO, gasoline and water vapors at concentrations much higher than ambient air. Compared to existing CO monitor, the PQC detector developed has advantages of adequate selectivity, high sensitivity, fast response and a much lower detection limit for detecting CO at sub-ppm levels. However, it is limited by the total exposure to a maximum of 160μg CO that restricts its application to intermittent monitoring of low CO concentration. The present work has demonstrated the advantages of using strong non-reversible interaction to enhance PQC sensitivity, as the total exposure can be adjusted easily by a suitable control of the gas flowrate. © 2002 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/acaen_HK
dc.relation.ispartofAnalytica Chimica Actaen_HK
dc.subjectCarbon monoxideen_HK
dc.subjectChemical sensoren_HK
dc.subjectNon-reversible interactionen_HK
dc.subjectPiezoelectric quartz crystalen_HK
dc.titleDetermination of carbon monoxide in ambient air using piezoelectric crystal sorption detectionen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0003-2697&volume=456&spage=227&epage=239&date=2002&atitle=Determination+of+carbon+monoxide+in+ambient+air+using+piezoelectric+crystal+sorption+detectionen_HK
dc.identifier.emailFung, YS:ysfung@hku.hken_HK
dc.identifier.authorityFung, YS=rp00697en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0003-2670(02)00013-2en_HK
dc.identifier.scopuseid_2-s2.0-0037041173en_HK
dc.identifier.hkuros68496en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037041173&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume456en_HK
dc.identifier.issue2en_HK
dc.identifier.spage227en_HK
dc.identifier.epage239en_HK
dc.identifier.isiWOS:000174948600009-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridFung, YS=13309754700en_HK
dc.identifier.scopusauthoridWong, CCW=55334074900en_HK

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