Determination and load of organophosphorus and organochlorine pesticides at water from Jiulong River Estuary, China

摘要

Seventeen organic phosphorus pesticides(Ops)and 18 organic chlorine pesticides(OCs)at water from Jiulong River Estuary (JLRE)are determined by SPE-GC-(FPD andμECD). The contents of the total Ops(17)ranged from 134.8 to 354.6 ng/l(the mean is 227.2 ng/l). Total OCs concentrations varied from 115.4 to 414.7 ng/l in water(mean 237.7 ng/l). The levels of total hexachlo- rocyclohexane in water varied from 31.95 to 139. Ng/l(mean 62.51 ng/l), and those of total DDTs were in the range 19.24-96.64 ng/l (mean 48.69 ng/l). The distribution and behavior characteristics of Ops indicate that five main Ops(methamidophos, dichlorvos, malathion, omethoate and dimethoate)occupied the most part of the total Ops, in addition, the sources of the Ops(mainly from current usage)are not stable.