Abstract
The perfluorooctane sulfanate (PFOS) concentrations and its weekly variations in an urban atmosphere were determined. Airborne particles (TSP) were collected on filters every day in July 3-29 (summer) and December 1-27 (winter), 2006 in Wako-shi Saitama prefecture, located northwest of Tokyo. They were extracted by methanol, and analyzed by LC/MS/MS. The PFOS recovery of this method was 90%, and the reproducibility was 13% (c.v.). The geometric mean concentrations of TSP in July (48 μg/m3) and in December (43 μg/m3) were almost the same. In contrast, the PFOS concentrations in July (6.8 pg/m3) were higher than in December (3.5 pg/m3). The PFOS concentrations in the atmosphere were lower on Saturdays and Sundays than the other weekdays in both summer and winter.
