2004 年 29 巻 4 号 p. 313-321
The behavior of prallethrin evaporated from an electric vaporizer was investigated through three experiments to determine: 1) distribution of residue levels on the floor, 2) floor levels during prolonged daily evaporation and 3) amount of residue transferable from the floor. Results of the third experiment suggest a regular decrease of transfer efficiency denoted by the function of time (t)−0.5. From the measured values, dermal exposure was estimated for Japanese sub-groups using a new methodology based on the US EPA procedure, taking into account periodic application, a body-specific transfer factor, the transition rate through clothes, and the ratio of bodily deposition to floor deposition. © Pesticide Science Society of Japan