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Article: Development of a piezoelectric crystal sorption detector for monitoring of total organic compounds in air

TitleDevelopment of a piezoelectric crystal sorption detector for monitoring of total organic compounds in air
Authors
KeywordsMoisture interference
Piezoelectric quartz crystal detector
Portable organic vapour monitor
Volatile organic compounds
Issue Date2000
PublisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/03067319.asp
Citation
International Journal Of Environmental Analytical Chemistry, 2000, v. 78 n. 3-4, p. 397-412 How to Cite?
AbstractA light and portable organic vapours monitor has been developed using piezoelectric (P/Z) quartz crystal to determine Volatile Organic Compounds (VOCs) commonly found in workplace air. Out of the eight coating material studied, High Vacuum Grease (HVG) was found to be the best for determining commonly encountered organic vapours such as 1,1,1-Trichloroethane, Chloroform, Benzene and Toluene in room air. The optimised coating weight was 23 μg HVG at a flow rate of 200 mL/min. Moisture was found to interfere and the use of a Nation gas dryer was found to reduce the relative humidity to a constant 37 % for room air with 43 - 81% relative humidity. Under optimised conditions, a mean sensitivity of 1.9 × 10-2 Hz/ppm was obtained for total VOCs with 17.2% RSD variation towards different VOCs. Excellent linear working ranges were obtained from 40 to 2400 ppm (v/v), with response time and recovery time within one minute up to 500 ppm (v/v) of analyte. High and relatively constant response factors were obtained for different VOCs. The reliability of the method has been established by parallel method comparison using established GC-FID method. The P/Z detector developed could also be used to monitor individual VOCs.
Persistent Identifierhttp://hdl.handle.net/10722/70227
ISSN
2015 Impact Factor: 1.411
2015 SCImago Journal Rankings: 0.425
References

 

DC FieldValueLanguage
dc.contributor.authorFung, YSen_HK
dc.contributor.authorWong, YYen_HK
dc.date.accessioned2010-09-06T06:20:54Z-
dc.date.available2010-09-06T06:20:54Z-
dc.date.issued2000en_HK
dc.identifier.citationInternational Journal Of Environmental Analytical Chemistry, 2000, v. 78 n. 3-4, p. 397-412en_HK
dc.identifier.issn0306-7319en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70227-
dc.description.abstractA light and portable organic vapours monitor has been developed using piezoelectric (P/Z) quartz crystal to determine Volatile Organic Compounds (VOCs) commonly found in workplace air. Out of the eight coating material studied, High Vacuum Grease (HVG) was found to be the best for determining commonly encountered organic vapours such as 1,1,1-Trichloroethane, Chloroform, Benzene and Toluene in room air. The optimised coating weight was 23 μg HVG at a flow rate of 200 mL/min. Moisture was found to interfere and the use of a Nation gas dryer was found to reduce the relative humidity to a constant 37 % for room air with 43 - 81% relative humidity. Under optimised conditions, a mean sensitivity of 1.9 × 10-2 Hz/ppm was obtained for total VOCs with 17.2% RSD variation towards different VOCs. Excellent linear working ranges were obtained from 40 to 2400 ppm (v/v), with response time and recovery time within one minute up to 500 ppm (v/v) of analyte. High and relatively constant response factors were obtained for different VOCs. The reliability of the method has been established by parallel method comparison using established GC-FID method. The P/Z detector developed could also be used to monitor individual VOCs.en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/03067319.aspen_HK
dc.relation.ispartofInternational Journal of Environmental Analytical Chemistryen_HK
dc.subjectMoisture interferenceen_HK
dc.subjectPiezoelectric quartz crystal detectoren_HK
dc.subjectPortable organic vapour monitoren_HK
dc.subjectVolatile organic compoundsen_HK
dc.titleDevelopment of a piezoelectric crystal sorption detector for monitoring of total organic compounds in airen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0306-7319&volume=78&issue=3-4&spage=397&epage=412&date=2000&atitle=Development+of+a+piezoelectric++crystal+sorption+detector+for+monitoring+of+total+organic+compounds+in+airen_HK
dc.identifier.emailFung, YS:ysfung@hku.hken_HK
dc.identifier.authorityFung, YS=rp00697en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0034452065en_HK
dc.identifier.hkuros62495en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034452065&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume78en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage397en_HK
dc.identifier.epage412en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridFung, YS=13309754700en_HK
dc.identifier.scopusauthoridWong, YY=7403041805en_HK

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