Potential Dermal and Inhalation Exposure to Chlorpyrifos in Australian Pesticide Workers
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Chlorpyrifos inhalation, dermal exposure and working practices of 28 pesticide applicators in Western Australia were assessed during a series of single property applications of a 0.5% (n2) or 1% (n26) concentration of active ingredient in water solution. Deposition on new cotton gloves worn beneath applicators’ usual protective gloves was 2.4 (range 0.12–86.1) mg h_1. Median deposition of chlorpyrifos onto a new cotton overall worn over other clothing (24 sections removed, corrected for body proportions) was 11.1 (range 0.2–41.9) mg h_1. Deposition onto seven patches taped to the applicators’ skin was 0.04 (range 0.01–4.7) mg h_1. Inhalation concentration was 5.7 (range 0.7–219) mg m_3 time weighted average. In one group of 17 applicators’ applying to existing properties, breathing zone air concentration correlated (P_0.05) with ambient air temperature (15–38C). The questionnaire results (29 respondents) indicated applicators’ practices led to increased exposure, in particular concerning poor usage and condition of protective equipment and a high frequency of splashes and spills onto the body. Prevention of deposition on clothing, in particular on the lower body is suggested, as well as improved working practices.
|Publication Type:||Journal Article|
|Publisher:||Elsevier Science Ltd|
|Copyright:||British Occupational Hygiene Society|
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