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Proceedings Paper

Development of a fieldable rapid pesticide exposure analysis sensing system
Author(s): Kevin M. Spencer; Susan L. Clauson; Sarah A. Spencer; James M. Sylvia; Quirina M. Vallejos; Sara A. Quandt; Thomas A. Arcury
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Paper Abstract

Despite the recent interest in organically grown foods, most agricultural crops use multiple pesticides to optimize yield. There are many persons whose health may be affected by the spraying; there is the active applicator and the passive neighbors. In between these extremes are the farm workers who pick the crops anywhere from days to weeks after application. How much pesticide residue are these workers exposed to during a workday and how much is transferred back to the residence? Despite the low vapor pressures, what is the true concentration of pesticides surrounding a person when pesticides adsorbed to particulate matter are included? What is the relationship between the concentration around an individual and the amount adsorbed/ingested? To answer these questions on a statistically significant scale in actual field conditions, a portable, fast, inexpensive measurement device is required. We present herein results obtained using Surface-Enhanced Raman Spectroscopy (SERS) that demonstrate the capability to detect < 100 organophosphate, organochlorine and carbamate-based pesticides in the vapor phase as well as the ability of SERS sensors to detect a particular analyte in a synthetic urine matrix. We will also present data collected from CDC quantified urine samples and will present results obtained in a field test wherein SERS sensors wore worn as dosimeters in the field and real-time vapor sampling of the farm workers barracks was performed. The issue of potential interferences will also be discussed.

Paper Details

Date Published: 22 April 2010
PDF: 9 pages
Proc. SPIE 7673, Advanced Environmental, Chemical, and Biological Sensing Technologies VII, 767302 (22 April 2010); doi: 10.1117/12.850182
Show Author Affiliations
Kevin M. Spencer, EIC Labs., Inc. (United States)
Susan L. Clauson, EIC Labs., Inc. (United States)
Sarah A. Spencer, EIC Labs., Inc. (United States)
James M. Sylvia, EIC Labs., Inc. (United States)
Quirina M. Vallejos, Wake Forest Univ. School of Medicine (United States)
Sara A. Quandt, Wake Forest Univ. School of Medicine (United States)
Thomas A. Arcury, Wake Forest Univ. School of Medicine (United States)

Published in SPIE Proceedings Vol. 7673:
Advanced Environmental, Chemical, and Biological Sensing Technologies VII
Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editor(s)

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