摘要：As a part of a series of studies to clarify the routes of human exposure and the environmental behaviour of termiticides, the analyses of 2, 3, 3, 3, 2', 3', 3', 3'-octachlorodipropylether (an organochlorine synergist, S-421) levels in surface water, sediments and rain were carried out. Surface water and sediments were collected from Osaka bay and three rivers near Osaka district. Rain was sampled at the roof of our institute in Osaka. S-421 was detected in all samples of the surface water and the sediments analyzed to the extent of 1.6 to 11.7 ng/l, and 1.5 to 3.2 ng/g, respectively. S-421 was detected in 9 of 13 samples of rain analyzed to the extent of 1.0 to 3.7 ng/l. Rain contained HCHs in the low ppt range.
