Grantee Research Project Results

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: Hahn, Intaek
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, Toxics, Air, Geographic Area, air toxics, VOCs, State, tropospheric ozone, Atmospheric Sciences, EPA Region, environmental monitoring, monitoring, ambient ozone data, mass spectrometry, Indiana, ambient air, measurement of oxygenated compounds, ozone, air quality data, air sampling, aerosol sampling, atmospheric monitoring, Region 5, field measurements, IN, quantitative monitoring of oxidant precursors, rapid sampling and analysis

Relevant Websites:

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

Progress and Final Reports:

The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.