Implications of inhalation bioaccessibility for the exposure assessment of drifting airborne pesticides caused by field spraying.

Pesticide contamination in ambient air due to spray drifting has received extensive attention. Quantifying the associated health risk highlights the importance of incorporating bioaccessibility into inhalation exposure assessments rather than using the total inhaled concentration of airborne pesticides. In this study, we measured the inhalation unit exposure (UE) of three typical pesticides (lambda-cyhalothrin, phoxim, and acetamiprid) during application and post-application drift at the recommended application dosage.