A new laser-based and ultra-portable gas sensor for indoor and outdoor formaldehyde (HCHO) monitoring.
作者： Joshua D. Shutter , Norton T. Allen , Thomas F. Hanisco , Glenn M. Wolfe , Jason M. St. Clair
关键词: Detection limit 、 Remote sensing 、 Ambient air 、 Sampling (signal processing) 、 Instrumentation 、 Absorption (electromagnetic radiation) 、 Formaldehyde 、 Laser 、 Environmental science 、 Fitting algorithm
摘要: Abstract. In this work, a new commercially available, laser-based, and ultra-portable formaldehyde (HCHO) gas sensor is characterized, its usefulness for monitoring HCHO mixing ratios in both indoor outdoor environments is assessed. Stepped calibrations intercomparison with well-established laser-induced fluorescence (LIF) instrumentation allow performance evaluation of the absorption-based, mid-infrared from Aeris Technologies, Inc. The Aeris displays linear behavior ( R2 > 0.940) when compared LIF instruments from Harvard NASA Goddard. A nonlinear least-squares fitting algorithm developed independently sensor's manufacturer to fit raw absorption data during post-processing further improves instrument performance. 3σ limit detection (LOD) for 2, 15, 60 min integration times are 2190, 690, 420 pptv HCHO, respectively, mixing ratios reported real time, though LOD 1800, 570, and 300 pptv post-processing. Moreover, accuracy of was found be ± (10 % + 0.3) ppbv compared against sampling ambient air. aforementioned precision and level accuracy sufficient most levels measured and outdoor environments. While compact currently not a replacement sensitive research-grade available, its monitoring clearly demonstrated.
atmos-meas-tech.net参考文章(27)
Petter Weibring, Dirk Richter, James G. Walega, Alan Fried, First demonstration of a high performance difference frequency spectrometer on airborne platforms Optics Express. ,vol. 15, pp. 13476- 13495 ,(2007) , 10.1364/OE.15.013476
M. Cazorla, G. M. Wolfe, S. A. Bailey, A. K. Swanson, H. L. Arkinson, T. F. Hanisco, A new airborne laser-induced fluorescence instrument for in situ detection of formaldehyde throughout the troposphere and lower stratosphere Atmospheric Measurement Techniques. ,vol. 8, pp. 541- 552 ,(2015) , 10.5194/AMT-8-541-2015
David S. Sayres, E. J. Moyer, T. F. Hanisco, J. M. St. Clair, F. N. Keutsch, A. O’Brien, N. T. Allen, L. Lapson, J. N. Demusz, M. Rivero, T. Martin, M. Greenberg, C. Tuozzolo, G. S. Engel, J. H. Kroll, J. B. Paul, J. G. Anderson, A new cavity based absorption instrument for detection of water isotopologues in the upper troposphere and lower stratosphere. Review of Scientific Instruments. ,vol. 80, pp. 044102- 044102 ,(2009) , 10.1063/1.3117349
Tunga Salthammer, Formaldehyde in the Ambient Atmosphere: From an Indoor Pollutant to an Outdoor Pollutant? Angewandte Chemie. ,vol. 52, pp. 3320- 3327 ,(2013) , 10.1002/ANIE.201205984
Larry G. Anderson, John A. Lanning, Regina Barrell, Joyce Miyagishima, Richard H. Jones, Pamela Wolfe, Sources and sinks of formaldehyde and acetaldehyde: An analysis of Denver's ambient concentration data Atmospheric Environment. ,vol. 30, pp. 2113- 2123 ,(1996) , 10.1016/1352-2310(95)00175-1
John R. Hottle, Andrew J. Huisman, Joshua P. DiGangi, Aster Kammrath, Melissa M. Galloway, Katherine L. Coens, Frank N. Keutsch, A Laser Induced Fluorescence-Based Instrument for In-Situ Measurements of Atmospheric Formaldehyde Environmental Science & Technology. ,vol. 43, pp. 790- 795 ,(2009) , 10.1021/ES801621F
John H. Seinfeld, Spyros N. Pandis, Atmospheric Chemistry and Physics: From Air Pollution to Climate Change ,(1997)
Derek York, Norman M. Evensen, Margarita López Martı́nez, Jonás De Basabe Delgado, Unified equations for the slope, intercept, and standard errors of the best straight line American Journal of Physics. ,vol. 72, pp. 367- 375 ,(2004) , 10.1119/1.1632486
Alan Fried, Bryan P Wert, Bruce Henry, James R Drummond, Airborne tunable diode laser measurements of formaldehyde Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. ,vol. 55, pp. 2097- 2110 ,(1999) , 10.1016/S1386-1425(99)00082-7
William W. Nazaroff, Charles J. Weschler, Cleaning products and air fresheners: exposure to primary and secondary air pollutants Atmospheric Environment. ,vol. 38, pp. 2841- 2865 ,(2004) , 10.1016/J.ATMOSENV.2004.02.040