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Your search keyword '"IONIZATION MASS-SPECTROMETRY"' showing total 8 results
Start Over Descriptor "IONIZATION MASS-SPECTROMETRY" Publication Type Academic Journals
8 results on '"IONIZATION MASS-SPECTROMETRY"'

2. Observations of total RONO2 over the boreal forest: NOx sinks and HNO3 sources

Author

Browne, E. C, Min, K.-E., Wooldridge, P. J, Apel, E., Blake, D. R, Brune, W. H, Cantrell, C. A, Cubison, M. J, Diskin, G. S, Jimenez, J. L, Weinheimer, A. J, Wennberg, P. O, Wisthaler, A., and Cohen, R. C

Subjects
Laser-Induced Fluorescence, Volatile Organic-Compounds, Ionization Mass-Spectrometry, Atmospheric Boundary-Layer, Absorption Cross-Sections, Hydroxy Alkyl Nitrates, Henrys Law Constants, Tropical Rain-Forest, Gas-Phase Reactions, Isoprene Oxidation
Published
2013

3. Evaluation of HOx sources and cycling using measurement-constrained model calculations in a 2-methyl-3-butene-2-ol (MBO) and monoterpene (MT) dominated ecosystem

Author

Kim, S., Wolfe, G. M, Mauldin, L., Cantrell, C., Guenther, A., Karl, T., Turnipseed, A., Greenberg, J., Hall, S. R, Ullmann, K., Apel, E., Hornbrook, R., Kajii, Y., Nakashima, Y., Keutsch, F. N, DiGangi, J. P, Henry, S. B, Kaser, L., Schnitzhofer, R., Graus, M., Hansel, A., Zheng, W., and Flocke, F. F

Subjects
Ionization Mass-Spectrometry, Laser-Induced Fluorescence, Volatile Organic-Compounds, Oh Reactivity Measurements, Pearl River Delta, Boreal Forest, Atmospheric Oxidation, Tropospheric Ho2, Chemistry, Isoprene
Published
2013

4. Quantitative and qualitative sensing techniques for biogenic volatile organic compounds and their oxidation products

Author

Kim, Saewung, Guenther, Alex, and Apel, Eric

Subjects
ionization mass-spectrometry, 2-dimensional gas-chromatography, relative rate constants, ni-pt-cims, ambient air, united-states, hydrocarbon emissions, sampling methods, oh-reactivity, trace gases
Abstract

The physiological production mechanisms of some of the organics in plants, commonly known as biogenic volatile organic compounds (BVOCs), have been known for more than a century. Some BVOCs are emitted to the atmosphere and play a significant role in tropospheric photochemistry especially in ozone and secondary organic aerosol (SOA) productions as a result of interplays between BVOCs and atmospheric radicals such as hydroxyl radical (OH),ozone (O3) and NOX (NO + NO2). These findings have been drawn from comprehensive analysis of numerous field and laboratory studies that have characterized the ambient distribution of BVOCs and their oxidation products, and reaction kinetics between BVOCs and atmospheric oxidants. These investigations are limited by the capacity for identifying and quantifying these compounds. This review highlights the major analytical techniques that have been used to observe BVOCs and their oxidation products such as gas chromatography, mass spectrometry with hard and soft ionization methods, and optical techniques from laser induced fluorescence (LIF) to remote sensing. In addition, we discuss how new analytical techniques can advance our understanding of BVOC photochemical processes. The principles, advantages, and drawbacks of the analytical techniques are discussed along with specific examples of how the techniques were applied in field and laboratory measurements. Since a number of thorough review papers for each specific analytical technique are available, readers are referred to these publications rather than providing thorough descriptions of each technique. Therefore, the aim of this review is for readers to grasp the advantages and disadvantages of various sensing techniques for BVOCs and their oxidation products and to provide guidance for choosing the optimal technique for a specific research task.

Published
2013

5. An analysis of fast photochemistry over high northern latitudes during spring and summer using in-situ observations from ARCTAS and TOPSE

Author

Olson, J. R, Crawford, J. H, Brune, W., Mao, J., Ren, X., Fried, A., Anderson, B., Apel, E., Beaver, M., Blake, D., Chen, G., Crounse, J., Dibb, J., Diskin, G., Hall, S. R, Huey, L. G, Knapp, D., Richter, D., Riemer, D., Clair, J. St., Ullmann, K., Walega, J., Weibring, P., Weinheimer, A., Wennberg, P., and Wisthaler, A.

Subjects
ionization mass-spectrometry, hydrogen-peroxide h2o2, free troposphere, atmospheric chemistry, chemical evolution, california forest, polar sunrise, pem-tropics, ozone, transport
Published
2012

6. Impact of the deep convection of isoprene and other reactive trace species on radicals and ozone in the upper troposphere

Author

Apel, E. C, Olson, J. R, Crawford, J. H, Hornbrook, R. S, Hills, A. J, Cantrell, C. A, Emmons, L. K, Knapp, D. J, Hall, S., Mauldin III, R. L, Weinheimer, A. J, Fried, A., Blake, D. R, Crounse, J. D, Clair, J. M. St., Wennberg, P. O, Diskin, G. S, Fuelberg, H. E, Wisthaler, A., Mikoviny, T., Brune, W., and Riemer, D. D

Subjects
volatile organic-compounds, ionization mass-spectrometry, tropical upper troposphere, methyl vinyl ketone, lower stratosphere, pem-tropics, in-situ, ptr-ms, chemical evolution, north-atlantic
Published
2012

7. Reactive nitrogen, ozone and ozone production in the Arctic troposphere and the impact of stratosphere-troposphere exchange

Author

Liang, Q., Rodriguez, J. M, Douglass, A. R, Crawford, J. H, Olson, J. R, Apel, E., Bian, H., Blake, D. R, Brune, W., Chin, M., Colarco, P. R, da Silva, A., Diskin, G. S, Duncan, B. N, Huey, L. G, Knapp, D. J, Montzka, D. D, Nielsen, J. E, Pawson, S., Riemer, D. D, Weinheimer, A. J, and Wisthaler, A.

Subjects
ionization mass-spectrometry, high northern latitudes, chemical evolution, transport model, diode-laser, chemistry, photochemistry, pollution, aircraft, sensitivity
Published
2011

8. Nitrogen oxides and PAN in plumes from boreal fires during ARCTAS-B and their impact on ozone: an integrated analysis of aircraft and satellite observations

Author

Alvarado, M. J, Logan, J. A, Mao, J., Apel, E., Riemer, D., Blake, D., Cohen, R. C, Min, K.-E., Perring, A. E, Browne, E. C, Wooldridge, P. J, Diskin, G. S, Sachse, G. W, Fuelberg, H., Sessions, W. R, Harrigan, D. L, Huey, G., Liao, J., Case-Hanks, A., Jimenez, J. L, Cubison, M. J, Vay, S. A, Weinheimer, A. J, Knapp, D. J, Montzka, D. D, Flocke, F. M, Pollack, I. B, Wennberg, P. O, Kurten, A., Crounse, J., Clair, J. M. St., Wisthaler, A., Mikoviny, T., Yantosca, R. M, Carouge, C. C, and Le Sager, P.

Subjects
ionization mass-spectrometry, biomass burning emissions, high northern latitudes, long-range transport, carbon-monoxide, interannual variability, atmospheric chemistry, continental outflow, accurate simulation, tropospheric ozone
Published
2010

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