Development, Evaluation, and Application of a Fast Time Response Mass Spectrometric Method for Quantitative Monitoring of Oxidant Precursors

EPA Grant Number: R825256
Title: Development, Evaluation, and Application of a Fast Time Response Mass Spectrometric Method for Quantitative Monitoring of Oxidant Precursors
Investigators: Shepson, Paul
Institution: Purdue University
EPA Project Officer: Shapiro, Paul
Project Period: October 1, 1996 through September 30, 1999 (Extended to October 30, 2000)
Project Amount: $440,262
RFA: Air Quality (1996) RFA Text |  Recipients Lists
Research Category: Air Quality and Air Toxics , Air

Description:

To adequately address the role of reactive volatile organic compounds (VOCs) such as isoprene in tropospheric ozone production and loss processes, measurement techniques that permit reasonably rapid sampling and analysis for VOCs is needed. This project involves the development, fabrication, and field evaluation of a novel ion-trap MS/MS method for measurement of VOCs in air at trace levels. The method involves direct introduction of sample air into the ion trap, followed by target compound ionization and accumulation, and finally collisionally induced dissociation to produce product ions that are then detected. This method can enable measurement of several different VOCs on a time scale of one per minute or better. The developed method will be applied to studies of the importance of isoprene and its oxidation products to the production of ozone and peroxyacetyl nitrate (PAN) at an urban-impacted forest site in northern Michigan, in years 2 and 3 of the project.

Publications and Presentations:

Publications have been submitted on this project: View all 20 publications for this project

Journal Articles:

Journal Articles have been submitted on this project: View all 6 journal articles for this project

Supplemental Keywords:

air, ambient air, atmosphere, ozone, tropospheric, exposure, VOC, environmental chemistry, measurement methods, Indiana, IN, Region 5, RFA, Scientific Discipline, Air, Toxics, Geographic Area, air toxics, State, VOCs, tropospheric ozone, Atmospheric Sciences, EPA Region, environmental monitoring, monitoring, Indiana, mass spectrometry, ambient ozone data, ambient air, ozone, measurement of oxygenated compounds, air sampling, air quality data, atmospheric monitoring, aerosol sampling, IN, Region 5, field measurements, Michigan (MI), quantitative monitoring of oxidant precursors

Relevant Websites:

http://aoss.engin.umich.edu/PROPHET/ Exit EPA icon
http://www.chem.purdue.edu/shepson/shephome.html Exit EPA icon

Progress and Final Reports:

  • 1997
  • 1998
  • 1999 Progress Report
  • 2000
  • Final Report