1. Comparative evaluation of chlorpyrifos exposure estimates from whole-body dermal dosimetry and urinary trichloro-2-pyridinol (TCP) methods.
- Author
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Atabila, Albert, Phung, Dung Tri, Sadler, Ross, Connell, Des, and Chu, Cordia
- Subjects
CHLORPYRIFOS ,RADIATION dosimetry ,PYRIDINOLE ,PESTICIDES ,ENVIRONMENTAL exposure - Abstract
Abstract Chlorpyrifos is one of the most widely used organophosphate pesticides and has a record of adverse effects on applicators. Assessment of exposure to chlorpyrifos based on its urinary metabolite, 3,5,6-trichloro-2-pyridinol (TCP), is considered as the most accurate. However, urine sampling can be difficult, and the laboratory analytical procedures involved are complex and expensive. A simpler approach for assessing pesticide exposure among applicators is the whole-body dermal dosimetry method, but this needs validation. The objective of this study was to compare chlorpyrifos exposure estimates obtained separately with the urinary TCP and the whole-body dermal dosimetry methods from applicators. Exposure estimates from the whole-body dermal dosimetry method (5–29 μg/kg/day) showed less variation than those from the urinary TCP method (1–71 μg/kg/day), but both were in close agreement at the mean level (16 μg/kg/day and 15 μg/kg/day, respectively). The whole-body dermal dosimetry method is therefore valid for providing estimates of the typical levels of pesticide exposure among applicators in situations where the urinary TCP method cannot be applied. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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