Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
39, Number 8, August 2001, pp. 345-350
Gas
Chromatographic Method for Assessing the Dermal Exposure of Greenhouse Applicators
to Dimethoate and MalathionM.L.
Castro Cano, J.L. Martínez Vidal*, F.J. Egea González, and M.
Martínez Galera Department of Analytical Chemistry, University of Almería, 04120,
Almería, Spain
An
analytical method is developed to determine potential and actual dermal exposure
to dimethoate and malathion for agricultural workers using whole body dosimetry.
The methodology described includes three different aspects: the validation of
the analytical method incorporating a matrix effect for establishing performance
parameters such as recovery rates (between 92% and 103% for both pesticides),
limits of detection and quantitation, and precision of measurements (RSD <
10%); a field sampling strategy developing a procedure for collecting samples
and carrying out field spikes and field blanks in order to ensure the stability
of samples during transport, storage, and analysis; and finally, a quality control
procedure for ensuring that data are under statistical control. The method is
applied to evaluate the potential and actual dermal exposure as well as its
distribution for a pesticide applicator and the applicator’s assistant
after a greenhouse application. Operator exposure levels of approximately 68
mL/h, and 25 mL/h in the case of the assistant, are found. The body areas most
exposed are the lower body and hands.
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