Dermal Transfer Efficiency of Pesticides from New, Vinyl Sheet Flooring to Dryand Wetted Palms

摘要

This report presents results of a study to determine the transfer efficienciesfrom sheet vinyl flooring to human skin of three pesticides commonly used for residential indoor insect control. Formulations of the insecticides chlorpyrifos, pyrethrin I and pipeonyl butoxide were applied to new, sheet vinyl flooring by broadcast spray and allowed to dry for 4 hours. Deposition coupons were used to estimate initial surface loadings and the PUF Roller was to measure dislodgeable residues. After the 4-hour drying period, adult volunteers performed hand presses (left and right hands, palm only) with either dry or wetted skin. Water and the participant's own saliva were used as wetting agents. Transfer efficiencies for wetted palms were 2.5 to 3.5 times higher than those for dry palms. The mean (six presses) transfer efficiencies for chlorpyrofos were 5.22% for water-wetted (W), 4.38% for saliva-wetted (S), and 1.53% for dry skin (D). Similar transfer efficiencies were measured for piperolyl butoxide: W = 4.1%, and D = 1.4%. Transfer efficiencies for pyrethrin I were about twice as high as those for the other two pesticides: W = 11.9%, S = 8.9%, and D = 3.6%.