1 / 11

Aerosol Chemical Composition Using Aerosol Mass Spectrometry

Aerosol Chemical Composition Using Aerosol Mass Spectrometry. R. Chang, J. Abbatt – University of Toronto K. Hayden, R. Leaitch, S.-M. Li, J. Liggio – Environment Canada. ASCOS Workshop Landskrona April 9, 2008. Objectives. characterize composition of surface aerosols

samara
Download Presentation

Aerosol Chemical Composition Using Aerosol Mass Spectrometry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Aerosol Chemical Composition Using Aerosol Mass Spectrometry R. Chang, J. Abbatt – University of Toronto K. Hayden, R. Leaitch, S.-M. Li, J. Liggio – Environment Canada ASCOS Workshop Landskrona April 9, 2008

  2. Objectives • characterize composition of surface aerosols • physical properties, hygroscopic properties • source of air • local natural aerosol • Does it correlate with biological activity? • Is there an organic component? • Are the aerosols neutralized? Is there enough ammonia present? • Is there MSA in the aerosol? • transported anthropogenic aerosol • Are the aerosols neutralized? • Is there an organic component?

  3. Time-of-Flight Aerosol Mass Spectrometer Mass Spectrum Mode

  4. SOLAS 2007 in Canadian Arctic Organic Nitrate Sulphate Ammonium Chloride Clean 1 Clean 2

  5. Clean 1 Number Volume

  6. Sulphate MS Neutralized NIST H2SO4 Clean 1

  7. Time-of-Flight Aerosol Mass Spectrometer Particle Time of Flight Mode (PToF)

  8. PToF Distribution in Southern Ontario Sulphate Organic Ammonium Nitrate Chloride

  9. Halogen Chemistry withOut On The Ice (OOTI) J. Bottenheim, S. Netcheva – Environment Canada ASCOS Workshop Landskrona April 9, 2008

  10. Introduction Spring time chemistry Br2 + hν→ 2Br 2(Br + O3 → BrO + O2) (O3 depletion) BrO + DMS  DMSO Br/BrO + Hg0 RGM  mercury deposition Question: Can this chemistry occur in the summer?

  11. Instrumentation for Target Species BrO: Multi-Axis Differential Optical Absorption Spectrometer (MaxDOAS, Ocean Optics) O3: UV Absorption Based Monitor (2B) Hg0: Atomic Absorption Mercury Vapour Analyzer (Gardis)

More Related