References

AMT

Atmospheric Measurement Techniques

AMT

Atmos. Meas. Tech.

1867-8548

Copernicus Publications

Göttingen, Germany

10.5194/amt-6-2339-2013

A chemical analyzer for charged ultrafine particles

Gonser

S. G.

¹ ² Held

¹ ²

Junior Professorship in Atmospheric Chemistry, University of Bayreuth, 95440 Bayreuth, Germany

Bayreuth Center of Ecology and Environmental Research, University of Bayreuth, 95440 Bayreuth, Germany

11 09 2013

6 9 2339 2348

2013

This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/

This article is available from https://amt.copernicus.org/articles/6/2339/2013/amt-6-2339-2013.html

The full text article is available as a PDF file from https://amt.copernicus.org/articles/6/2339/2013/amt-6-2339-2013.pdf

New particle formation is a frequent phenomenon in the atmosphere and of major significance for the Earth's climate and human health. To date the mechanisms leading to the nucleation of particles as well as to aerosol growth are not completely understood. A lack of appropriate measurement equipment for online analysis of the chemical composition of freshly nucleated particles is one major limitation. We have developed a Chemical Analyzer for Charged Ultrafine Particles (CAChUP) capable of analyzing particles with diameters below 30 nm. A bulk of size-separated particles is collected electrostatically on a metal filament, resistively desorbed and subsequently analyzed for its molecular composition in a time of flight mass spectrometer. We report on technical details as well as characterization experiments performed with the CAChUP. Our instrument was tested in the laboratory for its detection performance as well as for its collection and desorption capabilities. The manual application of defined masses of camphene (C10H16) to the desorption filament resulted in a detection limit between 0.5 and 5 ng, and showed a linear response of the mass spectrometer. Flow tube experiments of 25 nm diameter secondary organic aerosol from ozonolysis of alpha-pinene also showed a linear relation between collection time and the mass spectrometer's signal intensity. The resulting mass spectra from the collection experiments are in good agreement with published work on particles generated by the ozonolysis of alpha-pinene. A sensitivity study shows that the current setup of CAChUP is ready for laboratory measurements and for the observation of new particle formation events in the field.

References 1

Allan, J. D., Delia, A. E., Coe, H., Bower, K. N., Alfarra, M. R., Jimenez, J. L., Middlebrook, A. M., Drewnick, F., Onasch, T. B., Canagaratna, M. R., Jayne, J. T., and Worsnop, D. R.: A generalised method for the extraction of chemically resolved mass spectra from Aerodyne aerosol mass spectrometer data, J. Aerosol Sci., 35, 909–922, 2004.

Bahreini, R., Keywood, M. D., Ng, N. L., Varutbangkul, V., Gao, S., Flagan, R. C., Seinfeld, J. H., Worsnop, D. R., and Jimenez, J. L.: Measurement of secondary organic aerosol from oxidation of cycloalkenes, terpenes, and m-xylene using an Aerodyne aerosol mass spectrometer, Environ. Sci. Technol., 39, 5674–5688, 2005.

Barsanti, K. C., McMurry, P. H., and Smith, J. N.: The potential contribution of organic salts to new particle growth, Atmos. Chem. Phys., 9, 2949–2957, <a href="http://dx.doi.org/10.5194/acp-9-2949-2009">https://doi.org/10.5194/acp-9-2949-2009</a>, 2009.

Chen, J. and Davidson, J. H.: Ozone production in the positive DC corona discharge: Model and comparison to experiments, Plasma Chem. Plasma P., 22, 495–522, 2002.

Chen, D. R. and Pui, D. Y. H.: A high efficiency, high throughput unipolar aerosol charger for nanoparticles, J. Nanopart. Res., 1, 115–126, 1999.

Chhabra, P. S., Flagan, R. C., and Seinfeld, J. H.: Elemental analysis of chamber organic aerosol using an aerodyne high-resolution aerosol mass spectrometer, Atmos. Chem. Phys., 10, 4111–4131, <a href="http://dx.doi.org/10.5194/acp-10-4111-2010">https://doi.org/10.5194/acp-10-4111-2010</a>, 2010.

Delfino, R. J., Sioutas, C., and Malik, S.: Potential role of ultrafine particles in associations between airborne particle mass and cardiovascular health, Environ. Health Persp., 113, 934–946, 2005.

Forster, P., Ramaswamy, V., Artaxo, P., Berntsen, T., Betts, R., Fahey, D. W., Haywood, J., Lean, J., Lowe, D. C., Myhre, G., Nganga, J., Prinn, R., Raga, G., Schulz, M., and Dorland, R. V.: Changes in Atmospheric Constituents and in Radiative Forcing, in: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Miller, H. L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 129–234, 2007.

Han, B., Kim, H.-J., Kim, Y.-J., and Sioutas, C.: Unipolar charging of fine and ultra-fine particles using carbon fiber ionizers, Aerosol Sci. Tech., 42, 793–800, 2008.

Held, A., Nowak, A., Birmili, W., Wiedensohler, A., Forkel, R., and Klemm, O.: Observations of particle formation and growth in a mountainous forest region in central Europe, J. Geophys. Res., 109, D23204, 2004.

Held, A., Rathbone, G. J., and Smith, J. N.: A thermal desorption chemical ionization ion trap mass spectrometer for the chemical characterization of ultrafine aerosol particles, Aerosol Sci. Tech., 43, 264–272, 2009.

Kostenidou, E., Pathak, R. K., and Pandis, S. N.: An algorithm for the calculation of secondary organic aerosol density combining AMS and SMPS data, Aerosol Sci. Tech., 41, 1002–1010, 2007.

Kulmala, M., Vehkamäki, H., Petäjä, T., Dal Maso, M., Lauri, A., Kerminen, V.-M., Birmili, W., and McMurry, P. H.: Formation and growth rates of ultrafine atmospheric particles: a review of observations, J. Aerosol Sci., 35, 143–176, 2004.

Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., Lehtinen, K. E. J., Sogacheva, L., Dal Maso, M., Aalto, P., Petäjä, T., Sogachev, A., Yoon, Y. J., Lihavainen, H., Nilsson, D., Facchini, M. C., Cavalli, F., Fuzzi, S., Hoffmann, T., Arnold, F., Hanke, M., Sellegri, K., Umann, B., Junkermann, W., Coe, H., Allan, J. D., Alfarra, M. R., Worsnop, D. R., Riekkola, M.-L., Hyötyläinen, T., and Viisanen, Y.: The role of VOC oxidation products in continental new particle formation, Atmos. Chem. Phys., 8, 2657–2665, <a href="http://dx.doi.org/10.5194/acp-8-2657-2008">https://doi.org/10.5194/acp-8-2657-2008</a>, 2008.

McMurry, P. H., Ghimire, A., Ahn, H. K., Sakurai, H., Moore, K., Stolzenburg, M., and Smith, J. N.: Sampling nanoparticles for chemical analysis by low resolution electrical mobility classification, Environ. Sci. Technol. 43, 4653–4658, 2009.

Otani, Y., Eryu, K., Furuuchi, M., Tajima, N., and Tekasakul, P.: Inertial classification of nanoparticles with fibrous filters. Aerosol Air Qual. Res., 7, 343–352, 2007.

Riipinen, I., Manninen, H. E., Yli-Juuti, T., Boy, M., Sipilä, M., Ehn, M., Junninen, H., Petäjä, T., and Kulmala, M.: Applying the Condensation Particle Counter Battery (CPCB) to study the water-affinity of freshly-formed 2–9 nm particles in boreal forest, Atmos. Chem. Phys., 9, 3317–3330, <a href="http://dx.doi.org/10.5194/acp-9-3317-2009">https://doi.org/10.5194/acp-9-3317-2009</a>, 2009.

Shilling, J. E., Chen, Q., King, S. M., Rosenoern, T., Kroll, J. H., Worsnop, D. R., DeCarlo, P. F., Aiken, A. C., Sueper, D., Jimenez, J. L., and Martin, S. T.: Loading-dependent elemental composition of a-pinene SOA particles, Atmos. Chem. Phys., 9, 771–782, <a href="http://dx.doi.org/10.5194/acp-9-771-2009">https://doi.org/10.5194/acp-9-771-2009</a>, 2009.

Smith, J. N., Moore, K. F., McMurry, P. H., and Eisele, F. L.: Atmospheric measurements of sub-20 nm diameter particle chemical composition by thermal desorption chemical ionization mass spectrometry, Aerosol Sci. Tech., 38, 100–110, 2004.

Smith, J. N., Barsanti, K. C., Friedli, H. R., Ehn, M., Kulmala, M., Collins, D. R., Scheckman, J. H., Williams, B. J., and McMurry, P. H.: Observations of aminium salts in atmospheric nanoparticles and possible climatic implications, P. Natl. Acad. Sci. USA, 107, 6634–6639, 2010.

Stieb, D. M., Judek, S., and Burnett, R. T.: Meta-analysis of time-series studies of air pollution and mortality: effects of gases and particles and the influence of cause of death, age, and season, JAPCA J. Air Waste Ma., 52, 470–484, 2002.

Stolzenburg, M. R. and McMurry, P. H.: Equations governing single and tandem DMA configurations and a new lognormal approximation to the transfer function, Aerosol Sci. Tech., 42, 421-432, 2008.

Stommel, Y. and Riebel, U.: A new corona discharge-based aerosol charger for submicron particles with low initial charge, J. Aerosol Sci., 35, 1051–1069, 2004.

Tolocka, M. P., Heaton, K. J., Dreyfus, M. A., Wang, S., Zordan, C. A., Saul, T. D., and Johnston, M. V.: Chemistry of particle inception and growth during α-pinene ozonolysis, Environ. Sci. Technol., 40, 1843–1848, 2006.

Voisin, D., Smith, J. N., Sakurai, H., McMurry, P. H., and Eisele, F. L.: Thermal desorption chemical ionization mass spectrometer for ultrafine particle chemical composition, Aerosol Sci. Tech., 37, 471–475, 2003.

Wang, S., Zordan, C. A., and Johnston, M. V.: Chemical characterization of individual, airborne sub-10-nm particles and molecules, Anal. Chem., 78, 1750–1754, 2006.

Wiedensohler, A.: Technical note: an approximation of the bipolar charge distribution for particles in the submicron size range, J. Aerosol Sci., 19, 387–389, 1988.

Winkler, P. M., Ortega, J., Karl, T., Cappellin, L., Friedli, H. R., Barsanti, K., McMurry, P. H., and Smith, J. N.: Identification of biogenic compounds responsible for size-dependent nanoparticle growth, Geophys. Res. Lett., 39, L20815, 2012.

Zhang, S.-H. and Flagan, R. C.: Resolution of the radial differential mobility analyzer for ultrafine particles, J. Aerosol Sci., 27, 1179–1200, 1996.

Zhang, S.-H., Akutsu, Y., Russell, L. M., Flagan, R. C., and Seinfeld, J. H.: Radial differential mobility analyzer, Aerosol Sci. Tech., 23, 357–372, 1995.