Laminar Flow Tube Reactor interface with quadrupole mass spectrometer

Mikheev, Vladimir B.; Laulainen, Nels S.; Pervukhin, Viktor V.; Barlow, Stephan E.
August 2000
AIP Conference Proceedings;2000, Vol. 534 Issue 1, p71
Academic Journal
Nucleation of supersaturated water vapor was studied using the Laminar Flow Tube Reactor (LFTR) technique. In order to check the presence of contaminants in the freshly nucleated water particles, the LFTR has been connected to a mass spectrometer. Trace amounts contaminants arising from the substances used as a circulating liquid to maintain temperatures of the LFTR have been detected. The results of the mass spectroscopic analysis are in full agreement with the observed values of nucleation rate.


Related Articles

  • Measurement of expected nucleation precursor species and 3-500-nm diameter particles at Mauna Loa... Weber, R.J.; McMurry, P.H. // Journal of the Atmospheric Sciences;6/15/95, Vol. 52 Issue 12, p2242 

    Analyzes the atmospheric measurements of expected homogeneous nucleation precursors and aerosols that were made at the Mauna Loa Observatory in Hawaii. Large molecular clusters and ultrafine particles; Molecular precursor vapors and aerosols; Calculation of particle growth and formation rates.

  • The influence of particle solubility on heterogeneous nucleation in binary vapor mixtures. Petersen, D.; Ortner, R.; Vrtala, A.; Laaksonen, A.; Kulmala, M.; Wagner, P. E. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p135 

    Heterogeneous nucleation of binary n-propanol — water vapor mixtures on non-soluble or partially soluble 8nm Ag and NaCl particles has been investigated experimentally. At constant temperature the vapor activities have been stepwise increased and the number of particles activated to...

  • Steady state homogeneous nucleation rate and primary particle size distribution. McClurg, Richard B. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p88 

    A self-consistent, analytic model for the steady state homogeneous nucleation rate and primary particle size distribution is presented. Classical homogeneous nucleation models give the rate of particle production, but are silent on the resulting primary particle size distribution. This size...

  • Observed H[sub 2]SO[sub 4] and OH concentrations and their relation to particle nucleation events in marine and rural continental air. Berresheim, H.; Elste, T.; Plass-Du¨lmer, C.; Birmili, W.; Wiedensohler, A.; O’Dowd, C. D.; Hansson, H. C.; Ma¨kela¨, J. M. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p823 

    High-time resolution measurements of ambient H[sub 2]SO[sub 4] and OH concentrations were made in conjunction with particle nucleation events observed at a coastal marine (Mace Head, Ireland) and a rural continental site (Hohenpeissenberg, Germany). Strong nucleation events occurred on a daily...

  • Equilibrium populations of small stable clusters in nucleation theory. Barrett, Jonathan C. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p163 

    Small clusters containing molecules with high relative momenta are likely to decay rapidly and so such arrangements should be excluded from consideration in nucleation theory. The effect of limiting the range of the momentum integrations when calculating the partition function of clusters...

  • Modelling polydispersed droplet spectra in nucleating steam flows. White, A. J.; Hounslow, M. J. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p499 

    The nucleation processes occurring within steam turbine and moist air flows often lead to the formation of a polydispersion of liquid droplets for which droplet sizes encompass several orders of magnitude. This paper outlines a method for modelling such size distributions for condensing steam...

  • Idiosyncrasies of nucleation in large, deeply supercooled liquid clusters. Bartell, Lawrence S.; Chushak, Yaroslav G.; Huang, Jinfan // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p45 

    Characteristic differences between the nucleation of solids in bulk liquids and in liquid clusters are identified in computer simulations, and the reasons for these differences are discussed.

  • Bubble nucleation rates by pressure pulse experiments. Rathke, B.; Baumgartl, H.; Strey, R. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p414 

    We designed a precision method for observation of liquid-gas first order phase-transitions. At first we prepare a gas-saturated liquid of well known composition. Then we induce the phase transition by a rapid pressure quench under simultaneous detection of pressure and scattered light. To this...

  • Nucleation in physical and non-physical systems. Mahnke, Reinhard // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p229 

    The aggregation of particles out of an initially homogeneous situation is well known in physics. Depending on the system under consideration and its control parameters the cluster formation in a supersaturated (metastable or unstable) situation has been observed in nucleation physics as well as...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics