000062344 001__ 62344
000062344 005__ 20240712101029.0
000062344 0247_ $$2pmid$$apmid:19044365
000062344 0247_ $$2DOI$$a10.1063/1.2968712
000062344 0247_ $$2WOS$$aWOS:000259374500036
000062344 0247_ $$2Handle$$a2128/16761
000062344 037__ $$aPreJuSER-62344
000062344 041__ $$aeng
000062344 082__ $$a530
000062344 084__ $$2WoS$$aInstruments & Instrumentation
000062344 084__ $$2WoS$$aPhysics, Applied
000062344 1001_ $$0P:(DE-Juel1)7363$$aFuchs, H.$$b0$$uFZJ
000062344 245__ $$aMeasurement of tropospheric RO2 and HO2 radicals by a laser-induced fluorescence instrument (ROxLIF)
000062344 260__ $$a[S.l.]$$bAmerican Institute of Physics$$c2008
000062344 300__ $$a084104-1 - 084104-12
000062344 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
000062344 3367_ $$2DataCite$$aOutput Types/Journal article
000062344 3367_ $$00$$2EndNote$$aJournal Article
000062344 3367_ $$2BibTeX$$aARTICLE
000062344 3367_ $$2ORCID$$aJOURNAL_ARTICLE
000062344 3367_ $$2DRIVER$$aarticle
000062344 440_0 $$05309$$aReview of Scientific Instruments$$v79$$x0034-6748
000062344 500__ $$aRecord converted from VDB: 12.11.2012
000062344 520__ $$aA new method (ROxLIF) for the measurement of atmospheric peroxy radicals (HO(2) and RO(2)) was developed using a two-step chemical conversion scheme and laser-induced fluorescence (LIF) for radical detection. Ambient air is sampled into a differentially pumped flow reactor, in which atmospheric RO(x) radicals (=RO(2)+RO+HO(2)+OH) are chemically converted to HO(2) by a large excess of NO and CO at reduced pressures (ROx mode). When only CO is added as a reagent, the sum of atmospheric HO(2)+OH is converted to HO(2) (HOx mode). At the reactor outlet, part of the air flow is transferred into a low-pressure detection chamber, where the HO(2) is further converted by reaction with NO to OH, which is then detected with high sensitivity by LIF at 308 nm. The ROxLIF technique has been implemented in an existing LIF instrument that is also capable of measuring atmospheric OH. From the concurrent measurements of RO(x), HO(x) and OH, concentrations of HO(2) and RO(2) can be determined. The system is calibrated using the quantitative photolysis of water vapor at 185 nm as a radical source. Addition of CO or hydrocarbons to the calibration gas yields well-defined concentrations of HO(2) or RO(2), respectively, providing an estimated accuracy for the calibration of about 20%. The ROxLIF technique is extremely sensitive and has detection limits (signal-to-noise ratio=2) of about 0.1 pptv of HO(2) or RO(2) at a time resolution of 1 min. The paper describes the technique and its calibration, discusses the chemistry in the conversion reactor and possible interferences, and gives an example of ambient air measurements to demonstrate the performance of the new technique.
000062344 536__ $$0G:(DE-Juel1)FUEK406$$2G:(DE-HGF)$$aAtmosphäre und Klima$$cP22$$x0
000062344 588__ $$aDataset connected to Web of Science, Pubmed
000062344 650_7 $$2WoSType$$aJ
000062344 7001_ $$0P:(DE-Juel1)16342$$aHolland, F.$$b1$$uFZJ
000062344 7001_ $$0P:(DE-Juel1)16326$$aHofzumahaus, A.$$b2$$uFZJ
000062344 773__ $$0PERI:(DE-600)1472905-2$$a10.1063/1.2968712$$gVol. 79, p. 084104-1 - 084104-12$$p084104-1 - 084104-12$$q79<084104-1 - 084104-12$$tReview of scientific instruments$$v79$$x0034-6748$$y2008
000062344 8567_ $$uhttp://dx.doi.org/10.1063/1.2968712
000062344 8564_ $$uhttps://juser.fz-juelich.de/record/62344/files/1.2968712.pdf$$yOpenAccess
000062344 8564_ $$uhttps://juser.fz-juelich.de/record/62344/files/1.2968712.gif?subformat=icon$$xicon$$yOpenAccess
000062344 8564_ $$uhttps://juser.fz-juelich.de/record/62344/files/1.2968712.jpg?subformat=icon-180$$xicon-180$$yOpenAccess
000062344 8564_ $$uhttps://juser.fz-juelich.de/record/62344/files/1.2968712.jpg?subformat=icon-700$$xicon-700$$yOpenAccess
000062344 8564_ $$uhttps://juser.fz-juelich.de/record/62344/files/1.2968712.pdf?subformat=pdfa$$xpdfa$$yOpenAccess
000062344 909CO $$ooai:juser.fz-juelich.de:62344$$pdnbdelivery$$pdriver$$pVDB$$popen_access$$popenaire
000062344 9131_ $$0G:(DE-Juel1)FUEK406$$bUmwelt$$kP22$$lAtmosphäre und Klima$$vAtmosphäre und Klima$$x0$$zfortgesetzt als P23
000062344 9141_ $$y2008
000062344 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000062344 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000062344 9201_ $$0I:(DE-Juel1)VDB791$$d30.09.2010$$gICG$$kICG-2$$lTroposphäre$$x1
000062344 970__ $$aVDB:(DE-Juel1)98522
000062344 9801_ $$aFullTexts
000062344 980__ $$aVDB
000062344 980__ $$aConvertedRecord
000062344 980__ $$ajournal
000062344 980__ $$aI:(DE-Juel1)IEK-8-20101013
000062344 980__ $$aUNRESTRICTED
000062344 981__ $$aI:(DE-Juel1)ICE-3-20101013
000062344 981__ $$aI:(DE-Juel1)IEK-8-20101013