Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/65665
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dc.contributorDepartment of Civil and Environmental Engineering-
dc.creatorCui, L-
dc.creatorZhang, Z-
dc.creatorHuang, Y-
dc.creatorLee, SC-
dc.creatorBlake, DR-
dc.creatorHo, KF-
dc.creatorWang, B-
dc.creatorGao, Y-
dc.creatorWang, XM-
dc.creatorLouie, PKK-
dc.date.accessioned2017-05-22T02:09:01Z-
dc.date.available2017-05-22T02:09:01Z-
dc.identifier.issn1867-1381en_US
dc.identifier.urihttp://hdl.handle.net/10397/65665-
dc.language.isoenen_US
dc.publisherCopernicus Gesellschaften_US
dc.rights© Author(s) 2016. This is an open access article distributed under the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.rightsThe following publication: Cui, L., Zhang, Z., Huang, Y., Lee, S. C., Blake, D. R., Ho, K. F., Wang, B., Gao, Y., Wang, X. M., and Louie, P. K. K.: Measuring OVOCs and VOCs by PTR-MS in an urban roadside microenvironment of Hong Kong: relative humidity and temperature dependence, and field intercomparisons, Atmos. Meas. Tech., 9, 5763-5779 is available at https://doi.org/10.5194/amt-9-5763-2016, 2016.en_US
dc.titleMeasuring OVOCs and VOCs by PTR-MS in an urban roadside microenvironment of Hong Kong : relative humidity and temperature dependence, and field intercomparisonsen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage5763en_US
dc.identifier.epage5779en_US
dc.identifier.volume9en_US
dc.identifier.issue12en_US
dc.identifier.doi10.5194/amt-9-5763-2016en_US
dcterms.abstractVolatile organic compound (VOC) control is an important issue of air quality management in Hong Kong because ozone formation is generally VOC limited. Several oxygenated volatile organic compound (OVOC) and VOC measurement techniques - namely, (1) offline 2,4-dinitrophenylhydrazine (DNPH) cartridge sampling followed by high-performance liquid chromatography (HPLC) analysis; (2) online gas chromatography (GC) with flame ionization detection (FID); and (3) offline canister sampling followed by GC with mass spectrometer detection (MSD), FID, and electron capture detection (ECD) - were applied during this study. For the first time, the proton transfer reaction-mass spectrometry (PTR-MS) technique was also introduced to measured OVOCs and VOCs in an urban roadside area of Hong Kong. The integrated effect of ambient relative humidity (RH) and temperature (T ) on formaldehyde measurements by PTR-MS was explored in this study. A Poly 2-D regression was found to be the best nonlinear surface simulation (r =0.97) of the experimental reaction rate coefficient ratio, ambient RH, and T for formaldehyde measurement. This correction method was found to be better than correcting formaldehyde concentrations directly via the absolute humidity of inlet sample, based on a 2- year field sampling campaign at Mong Kok (MK) in Hong Kong. For OVOC species, formaldehyde, acetaldehyde, acetone, and MEK showed good agreements between PTRMS and DNPH-HPLC with slopes of 1.00, 1.10, 0.76, and 0.88, respectively, and correlation coefficients of 0.79, 0.75, 0.60, and 0.93, respectively. Overall, fair agreements were found between PTR-MS and online GC-FID for benzene (slope=1.23, r =0.95), toluene (slope=1.01, r =0.96) and C2-benzenes (slope=1.02, r =0.96) after correcting benzene and C2-benzenes levels which could be affected by fragments formed from ethylbenzene. For the intercomparisons between PTR-MS and offline canister measurements by GCMSD/FID/ECD, benzene showed good agreement, with a slope of 1.05 (r =0.62), though PTR-MS had lower values for toluene and C2-benzenes with slopes of 0.78 (r =0.96) and 0.67 (r =0.92), respectively. All in all, the PTR-MS instrument is suitable for OVOC and VOC measurements in urban roadside areas.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationAtmospheric measurement techniques, 2016, v. 9, no. 12, p. 5763-5779-
dcterms.isPartOfAtmospheric measurement techniques-
dcterms.issued2016-
dc.identifier.isiWOS:000389209900001-
dc.identifier.scopus2-s2.0-85002179283-
dc.identifier.ros2016001475-
dc.identifier.eissn1867-8548en_US
dc.identifier.rosgroupid2016001449-
dc.description.ros2016-2017 > Academic research: refereed > Publication in refereed journalen_US
dc.description.validate201811_a bcmaen_US
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberRGC-B1-078, OA_IR/PIRAen_US
dc.description.fundingSourceRGCen_US
dc.description.pubStatusPublisheden_US
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