Aerosol Dynamics Inc.


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Water-based Condensation Particle Counters (WCPC)

Thermal Desorption Aerosol GC-MS (TAG)

High Flow DMA

Automated Nitrate Monitor

Field Studies:

Measurement Field Evaluations



Water-Based Condensaton Particle Counters (WCPC)

Hering, SV; Stolzenburg, MR , A method for particle size amplification by water condensation in a laminar, thermally diffusive flow , Aerosol Science and Technology, 39 (5):428-436 (2005)

Hering,SV; Stolzenburg, MR; Quant, FR; Oberreit DR., Keady, PB., A laminar-flow, water-based condensation particle counter (WCPC), Aerosol Science and Technology, 39 (7): 659-672 (2005)

Thermal Desorption Aerosol Gas Chromatography (TAG)

Williams, BJ.; Goldstein, AH.; Millet, DB.; Holzinger, R; Kreisberg, NM.; Hering, SV.; White, AB.; Worsnop, DR.; Allan, JD.; Jimenez, JL., Chemical speciation of organic aerosol during the International Consortium for Atmospheric Research on Transport and Transformation 2004: Results from in situ measurements Journal of Geophysical Research, 112:D10, #D10S26 (2007)

Williams, BJ; Goldstein, AH; Kreisberg, NM; Hering S.V. , An in-situ instrument for speciated organic composition of atmospheric aerosols: Thermal Desorption Aerosol GC/MS-FID (TAG) , Aerosol Science and Technology, 40 (8): 627-638(2006)

High Flow DMA

Kreisberg, N., Stolzenburg, M., Hering S., Dick, W., McMurry, P., A new method for the measuring the dependence of particle size distributions on relative humidity, Journal of Geophysical Research, D 14, 14935-14950 (2001).

Stolzenburg, M.R., Kreisberg, N. M., Hering, S.V., Atmospheric size distributions measured by differential mobility optical particle size spectrometry AerosolScience and Technology 29; 402-418. (1998)

Automated Nitrate Monitor

Stolzenburg, MR; Dutcher, DD; Kirby, BW; Hering, SV, Automated measurement of the size and concentration of airborne particulate nitrate, Aerosol Science and Technology 37 (7): 537-54 (2003)

Hering S. V., Stolzenburg M. R., Hand J. L., Kriedenweis S. M. Lee T-Y., Collett J.L., Dietrich, D., Tigges M., Hourly concentrations and light scattering cross sections for fine particle sulfate at Big Bend National Park, Atmospheric Environment 37(9-10): 1175-1183 (2003)

Fine, PM; Jaques, PA; Hering, SV., Sioutas C. Performance evaluation and use of a continuous monitor for measuring size fractionated PM2.5 nitrate, Aerosol Science and Technology 37(4):342-354 (2003)

Stolzenburg, M. R. and Hering, S. V., A new method for the automated measurement of atmospheric fine particle nitrate, Environmental Science and Technology 34:  907-914 (2000)

Liu, D. Y., Prather, K. A., Hering, S. V., Variations in nitrate containing particles in Riverside California, Aerosol Science and Technology. 33:71-86 (2000).

Atmospheric Studies

Hering, SV; Kreisberg, NM; Stolzenburg, MR; Lewis, GS , Comparison of particle size distributions at urban and agricultural sites in California's San Joaquin Valley , Aerosol Science and Technology, 41 (1): 86-96(2007)

Hand, J.,Kreidenweis, S., Kreisberg, N., Hering, S., Stolzenburg, M., Dick, W., McMurry, P.H., Comparisons of aerosol properties measured by impactors and light scattering from individual particles: refractive index, number and volume concentrations, and size distributions,Atmospheric Environment 36 : 1853-1861 (2002)

Hand, J. L., Kriedenweis, S. M., Sherman, D. E., Collett J. L., Hering, S. V., Day D. E., Malm, W. C., (2002) Aerosol size distributions and visibility estimates during the Big Bend regional aerosol and visibility observational (BRAVO) study, Atmospheric Environment 36: 5043-5055 (2002).

McDade, C., Tombach I., Hering S., Kreisberg, N., Analysis and simulation of wintertime light scattering by the urban aerosol in Dallas-Fort Worth, J. Air and Waste Management Assoc., 50: 849-857 (2000).

Kirchstetter, T. W., Harley R. A., Kreisberg N. M., Stolzenburg M. R. and Hering, S. V., On-road measurement of fine particle and nitrogen oxide emissions from light-and heavy-duty motor vehicles, Atmospheric Environment 33: 2955-2968 (1999)

Marr, L. C., Kirchstetter, T. W., Harley, R. A., Miguel, A. H., Hering, S. V., Hammond, S. K., Characterization of polycyclic aromatic hydrocarbons in motor vehicle fuels and exhaust emissions, Environmental Science and Technology 33: 3091-3099 (1999)

Miguel, A. H., Kirchstetter T. W., Harley, R. A. and Hering, S. V., On-road emissions of particulate polycyclic aromatic hydrocarbons and black carbon from gasoline and diesel vehicles, Environmental Science and Technology 32, 450-455 (1998).

Hering, S.V., Eldering, A., and Seinfeld, J. H., Bimodal character of accumulation mode aerosols in Southern California, Atmospheric Environment 31: 1-11 (1997)

Young, J.R., Ellis, C. and Hering, S. V. The Los Angeles Characterization and Source Apportionment Study:  an overview, Aerosol Science and Technology 21:259-268 (1994).

Zhang, X.Q., P.H. McMurry, S.V. Hering and G.S. Casuccio, Mixing characteristics and water content of submicron aerosols measured in Los Angeles and at the Grand Canyon, Atmospheric Environment. 27A:1593-1607 (1993).

Zhang, X.Q., B.J. Turpin, P.H. McMurry, S.V. Hering and M.R. Stolzenburg, Mie theory evaluations of species contributions to wintertime visibility reduction in the Grand Canyon, J. Air Waste Management, 44:153-162 (1993).

Hering, S.V. and McMurry,  P.H. , Response of a PMS LAS-X laser optical counter to monodisperse atmospheric aerosols, Atmospheric Environment 25A:463-488 (1991).

Turner, J.R. and Hering, S.V. ,Vehicle contribution to ambient carbonaceous aerosols by scaled thermograms, Aerosol Science and Technology 12:620-629 (1990).

Hering, S. V., Friedlander, S. K., Origins of Sulfur Size Distributions in the Los Angeles Basin, Atmospheric Environment 16: 2647-2656 (1982).

Indoor Studies

Hering, SV; Lunden, MM, Thatcher, TL, Kirchstetter, TL,  Brown NJ, Using regional data and building leakage to assess indoor concentrations of particles of outdoor origin, Aerosol Science and Technology, 41, doi:10.1080/02786820701368026 639 - 654 (2007)

Lunden, MM; Revzan, KL; Fischer, ML, Thatcher TL, Littlejohn, D, Hering SV, Brown N.J, The transformation of outdoor ammonium nitrate in the indoor environment, Atmospheric Environment37 (39-40): 5633-5644(2003)

Lunden, M. M., Thatcher T. L., Hering S. V., Brown, N. J., Use of time-and chemically-resolved particulate data to characterize the infiltration of outdoor PM2.45 into a residence in the San Joaquin Valley, Environmental Science and Technology 37(20): 4724-4732 (2003) 

Field Evaluations of Measurement Methods-- nitrates

Hering,S. V., Fine, P.M., Sioutas, C., Jaques, P. A., Ambs, J. L., Hogrefe, O.,Demerjian K. L., Field Assessment of the Dynamics of Particulate Nitrate Vaporization Using Differential TEOM® and Automated Nitrate Monitors, Atmospheric Environment.38: 5183-5192 (2004)

Hering, S. V. and Cass G. R., The magnitude of bias in the measurement of PM2.5 arising from the volatilizaiton of particulate nitrate from Teflon filters, J. Air Waste Management Assoc. 49:725-733 (1999).

Hering,S.V., Lawson, D.L. et al., The nitric acid shootout:field comparison of measurement methods, Atmos. Environ. 22:1519-1539 (1988).

Hering, S.V., Blumenthal, D.L., Brewer, R.L., Gertler, A.S., Hoffmann, M., Kadlecek,J. and Petus, K., Field intercomparison of five types of fogwater collectors, Environmental Science. and Technology 21:654-663 (1987).

Hering, S.V., Field comparison of sampling methods for aerosol nitrate, in Aerosols, Formation and Reactivity, Pergamon Press, Oxford, U.K., pp. 515-518 (1986).

Field Evaluations of Measurement Methods -- organics

Turpin, B.J., J.J. Huntzicker and S.V. Hering, Investigation of organic aerosol sampling artifacts in the Los Angeles Basin, Atmospheric Environment 28:3061-3071 (1994).

Turner, J.R. and Hering, S.V. The additivity and stability of carbon signatures obtained by evolved gas analysis, Aerosol Science and Technology. 21:294-305 (1994).

Hering, S.V., Appel, B.R. ,Cadle, S.H. ,Cahill, T.A., Fitz, D., Howes, J.E. , Knapp, K.T. , Turpin, B.J.  and McMurry, P.H. , Comparisons of sampling methods for carbonaceous aerosols in ambient air, Aerosol Sci. Technol. 12:200-213 (1990).

Low-Pressure Impactors

Hering,S. V., Flagan, R. C. and Friedlander, S. K., Design and Evaluation of a New Low Pressure Impactor, 1, Environmental Science and Technology, 12:667-673 (1978)

Hering,S. V., Friedlander, S.K.,Collins, J.J. and Richards, L. W., Design and Evaluation of a New Low Pressure Impactor II, Environmental Science and Technology.,13:184-188 (1979)

Hering,S.V. and Marple, V.A. Low-pressure and micro-orifice impactors,Chapter 5 of Cascade Impactor Sampling and Data Analysis, J.P. Lodge and T.L. Chan, eds., A.I.H.A., 475 Wolf Ledges Parkway, Akron, Ohio 43311 (1986)

Turner,J.R. and Hering, S.V. Greased and oiled substrates asbounce-free impaction surfaces, Journal of Aerosol Science 18:215-224 (1987).

Hypersonic Impactors

Hering, S.V., Fernandez de la Mora, J., Halpern, B.L. ,Performance of an opposed-jet molecular impactor with W(CO)6 molecules suspended in a H2 carrier gas, Aerosol Sci. Technol. 8:1-9 (1988).

Fernandez de la Mora, J.,Hering,S.V.,Rao, N. and McMurry, P.H.,Hypersonic impaction of ultrafine particles, Journal of Aerosol Science 21:169-187 (1990).

Hering,S.V. and Stolzenburg, M.R.  On-line determination of single particle size and density in the nanometer size range, Aerosol Science and Technology, 23 :155-173 (1995).

FTIR Analysis of Impactor Deposits

Dangler, M., Burke, S., Hering, S.V. and Allen, D.T., A direct FTIR method for identifying functional groups in size-segregated atmospheric aerosols, Atmospheric Environment 21:1001-1004 (1987).

Brown, S., M.C. Dangler, S.R. Burke, S.V. Hering and D.T. Allen, Direct FTIR analysis of size-segregated aerosols:  results from the carbonaceous species methods intercomparison study, Aerosol Sci. Technol. 12:172-181 (1990).

Allen,D.T., Palen, E.J. , Haimov, M. I., Hering, S. V. , Fourier transform infrared spectroscopy of aerosol collected in a low-pressure impactor (LPI/FTIR) - method development and field calibration,Aerosol Science and Technology21: 325-342 (1994)