Grantee Research Project Results

Techniques for Standardization, Validation, and Measurement of Targeted Trace Gases Which Participate in Tropospheric Ozone Formation

EPA Grant Number: R825261
Title: Techniques for Standardization, Validation, and Measurement of Targeted Trace Gases Which Participate in Tropospheric Ozone Formation
Investigators: Apel, Eric C. , Fried, Alan
Current Investigators: Apel, Eric C. , Gilpin, Tim , Fried, Alan , Riemer, Dan
Institution: National Center for Atmospheric Research
EPA Project Officer: Hahn, Intaek
Project Period: January 1, 1997 through December 31, 1999
Project Amount: $472,250
RFA: Air Quality (1996) RFA Text | Recipients Lists
Research Category: Air Quality and Air Toxics , Air

Description:

Reactive trace gases such as formaldehyde, acetaldehyde, acetone, oxidation products of isoprene, and a variety of aldehydes, ketones, and alcohols are intimately involved in reactions leading to tropospheric ozone generation. Precise and accurate in-situ measurements of these gases are crucial for understanding fundamental atmospheric chemical cycles. The researchers propose to develop accurate and reliable standards for an important subset of these compounds and to demonstrate the ability to accurately measure these compounds in synthetic air mixtures with known levels of interferents. Several different approaches to making the necessary standards will be used including Henry?s Law devices, permeation/diffusion tube devices, and preparation of high pressure gas cylinders. Formaldehyde is the most unique compound to be studied as the detection apparatus for it is specific to formaldehyde. All other compounds will be detected with a gas chromatographic technique. The researchers will demonstrate the procedures necessary for proper calibration, conditions necessary for quantitative transfer through analytical systems, and detection of the targeted species. The researchers also propose to establish a calibration and testing facility at the National Center for Atmospheric Research (NCAR) as a resource for members of the atmospheric chemistry community involved (or soon to be involved) in the measurements of these compounds.

Publications and Presentations:

Publications have been submitted on this project: View all 9 publications for this project

Journal Articles:

Journal Articles have been submitted on this project: View all 4 journal articles for this project

Supplemental Keywords:

air, ambient air, atmosphere, ozone, VOC, environmental chemistry, monitoring, analytical, central, Colorado, CO, Region 8., RFA, Scientific Discipline, Air, Geographic Area, air toxics, Environmental Chemistry, State, tropospheric ozone, Atmospheric Sciences, EPA Region, monitoring, interferents, Henry's Law, aldehydes, ketone, National Center for Atmospheric Research, ozone formation, atmospheric chemical cycles, Region 8, standardization techniques, atmospheric monitoring, Colorado (CO), ozone production, trace gas measurement

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.