000128311 001__ 128311
000128311 005__ 20190316234409.0
000128311 0247_ $$2doi$$a10.1007/s00340-006-2335-6
000128311 022__ $$a0946-2171
000128311 02470 $$2DAR$$a9376
000128311 02470 $$2ISI$$a000240724900023
000128311 037__ $$aARTICLE
000128311 245__ $$aAmmonia trace measurements at ppb level based on near-IR photoacoustic spectroscopy
000128311 269__ $$a2006
000128311 260__ $$bSpringer Verlag$$c2006
000128311 336__ $$aJournal Articles
000128311 500__ $$aEcole Polytechnique Federale de Lausanne (EPFL), Nanophotonics and Metrology Laboratory, 1015 Lausanne, Switzerland Compilation and indexing terms, Copyright 2008 Elsevier Inc. 064010143142 0946-2171 Ammonia trace measurements Lock-in amplifiers Concentration measurements
000128311 520__ $$aA photoacoustic sensor using a laser diode emitting near 1532 nm in combination with an erbium-doped fibre amplifier has been developed for ammonia trace gas analysis at atmospheric pressure. NH3 concentration measurements down to 6 ppb and a noise-equivalent detection limit below 3 ppb in dry air are demonstrated. Two wavelength-modulation schemes with 1f and 2f detection using a lock-in amplifier were investigated and compared to maximise the signal-to-noise ratio. A quantitative analysis of CO2 and H 2O interference with NH3 is presented. Typical concentrations present in ambient air of 400 ppm CO2 and 1.15% H 2O (50% relative humidity at 20 °C) result in a NH3 equivalent concentration of 36 ppb and 100 ppb, respectively. © Springer-Verlag 2006.
000128311 6531_ $$aAmmonia
000128311 6531_ $$aTrace analysis
000128311 6531_ $$aPhotoacoustic spectroscopy
000128311 6531_ $$aInfrared spectroscopy
000128311 6531_ $$aAtmospheric pressure
000128311 6531_ $$aAmplifiers (electronic)
000128311 6531_ $$aAtmospheric humidity
000128311 700__ $$0240238$$g111245$$aBesson, J. P.
000128311 700__ $$0240237$$g107505$$aSchilt, S.
000128311 700__ $$aRochat, E.
000128311 700__ $$aThévenaz, Luc$$g106544$$0240503
000128311 773__ $$j85$$tApplied Physics B: Lasers and Optics$$k2-3$$q323-328
000128311 8564_ $$zURL
000128311 8564_ $$uhttps://infoscience.epfl.ch/record/128311/files/Applied_Physics_B_85_323-328_Besson_NH3_2006.pdf$$zn/a$$s1989447$$yPublisher's version
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000128311 909C0 $$pSCI-STI-LT$$xU12146$$0252591
000128311 909CO $$qGLOBAL_SET$$pSTI$$particle$$ooai:infoscience.tind.io:128311
000128311 917Z8 $$x106544
000128311 937__ $$aTHEVE-ARTICLE-2006-002
000128311 970__ $$a428/THEVE
000128311 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000128311 980__ $$aARTICLE