World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

A Method for Detecting the Presence of Organic Fraction in Nucleation Mode Sized Particles : Volume 5, Issue 3 (01/06/2005)

By Vaattovaara, P.

Click here to view

Book Id: WPLBN0003985714
Format Type: PDF Article :
File Size: Pages 26
Reproduction Date: 2015

Title: A Method for Detecting the Presence of Organic Fraction in Nucleation Mode Sized Particles : Volume 5, Issue 3 (01/06/2005)  
Author: Vaattovaara, P.
Volume: Vol. 5, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Laaksonen, A., Joutsensaari, J., Kühn, T., Vaattovaara, P., & Räsänen, M. (2005). A Method for Detecting the Presence of Organic Fraction in Nucleation Mode Sized Particles : Volume 5, Issue 3 (01/06/2005). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Applied Physics, University of Kuopio, P.O. Box 1627, FIN-70211 Kuopio, Finland. New particle formation and growth has a very important role in many climate processes. However, the overall knowlegde of the chemical composition of atmospheric nucleation mode (particle diameter, d<20 nm) and the lower end of Aitken mode particles (d≤50 nm) is still insufficient. In this work, we have applied the UFO-TDMA (ultrafine organic tandem differential mobility analyzer) method to shed light on the presence of organic fraction in the nucleation mode size class in different atmospheric environments. The basic principle of the organic fraction detection is based on our laboratory UFO-TDMA measurements with organic and inorganic compounds. Our laboratory measurements indicate that the usefulness of the UFO-TDMA in the field experiments would arise especially from the fact that atmospherically the most relevant inorganic compounds do not grow in subsaturated ethanol vapor, when particle size is 10nm in diameter and saturation ratio is about 86% or below it. Furthermore, internally mixed particles composed of ammonium bisulfate and sulfuric acid with sulfuric acid mass fraction ≤33% show no growth at 85% saturation ratio. In contrast, 10 nm particles composed of various organic compounds of atmospheric relevance are able to grow in those conditions. These discoveries indicate that it is possible to detect the presence of organics in atmospheric nucleation mode sized particles using the UFO-TDMA method. In the future, the UFO-TDMA is expected to be an important aid to describe the composition of atmospheric newly-formed particles.

Summary
A method for detecting the presence of organic fraction in nucleation mode sized particles


 

Click To View

Additional Books


  • A One-year Comprehensive Chemical Charac... (by )
  • Heterogeneous Conversion of No2 on Secon... (by )
  • A Comparison of Four Receptor Models Use... (by )
  • Long-term Solar Uv Radiation Reconstruct... (by )
  • Biannual Cycles of Organochlorine Pestic... (by )
  • Nitric Acid Trihydrate Nucleation and De... (by )
  • Patterns of Saharan Dust Transport Over ... (by )
  • Temporal Changes in the Emissions of Ch4... (by )
  • Aerosol Lidar Observations and Model Cal... (by )
  • Characteristics of Caliop Attenuated Bac... (by )
  • Atmospheric Inversion of the Surface Co2... (by )
  • Impacts of Aircraft Emissions on the Air... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.