Journal of Analytical & Bioanalytical Techniques
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The study was carried out to determine the role of pesticide application on airborne
VOC concentrations and ozone formation in the SJV. Th
e ozone formation
potential (OFP) from the pesticide formulation sprayed on commercial orchards was
studied using two transportable smog chambers at four application sites. In addition
to the direct measurements of ozone formation, airborne VOC concentrations were
measured before and aft
er pesticide spraying using Canister grab samples, adsorbent
tube time integrated samples and DNPH tube samples for carbonyl compounds. Soil
VOC concentrations were also measured to understand the distribution of VOCs
erent environmental compartments. Numerous VOCs were detected
in the air and soil samples throughout the experiment but higher molecular weight
aromatic hydrocarbons were the main compounds observed in elevated concentrations
er pesticide spraying. Measurements indicate that the ozone formation
of VOC downwind of the orchard may increase up to 15 ppb aft
er pesticide application
with a return back to pre-spray levels aft
er 1 to 2 days.
Dr Kumar is a Research Scientist at Carlsbad Environmental Monitoring and Research Center of New Mexico State University, Carlsbad, NM. He completed his Ph.D from the Institute of Chemical Technology, Czech Republic in 2006. He worked as a Postdoctoral Researcher at the University of California-Davis, CA. His research interests include, but not limited to, air quality improvement studies and sophisticated instrumental techniques.
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