Screening 31 endocrine-disrupting pesticides in water and surface sediment samples from Beijing Guanting reservoir.
For screening 31 potential or suspected endocrine-disrupting pesticides in water and surface sediments, a multiresidue analysis method based on gas chromatography with electron capture detection (GC/ECD) was developed. Solid phase extraction (SPE) technology with Oasis HLB cartridge was also applied in sample extraction. The relevant mean recoveries were 70-103% and 71-103% for water and sediment, respectively. Relative standard deviations (RSD) are 2.0-7.0%, 4.0-8.0% for water and sediment, respectively. Thirty one pesticides (alpha-HCH, beta-HCH, gamma-HCH, delta-HCH, hexachlorobenzene (HCB), aldrin, heptachlor, endosulfan I & II, p,p'-DDD, o,p'-DDT, p,p'-DDT, p,p'-DDE, endrin aldehyde, endosulfan sulphate, methoxychlor, hepachlor epoxide, alpha-chlordane, gamma-chlordane, dieldrin, endrin, dicofol, acetochlor, alachlor, metolachlor, chlorpyriphos, nitrofen, trifluralin, cypermethrin, fenvalerate, deltamethrin) in water and surface sediment samples from Beijing Guanting reservoir were analyzed. Concentrations of pesticides ranged from 7.59 to 36.0 ng g(-1) on a dry wt. basis for sediment samples, from 279.3 to 2740 ng l(-1) for pore waters and from 48.8 to 890 ng l(-1) for water samples, respectively, with a mean concentration of 10.7 ng g(-1) in sediment, 735 ng l(-1) in pore water and 295 ng l(-1) in water, respectively. The data obtained provides information on the levels and sources of endocrine-disrupting pesticides in Guanting reservoir. These results underscore the need to improved environmental protection measures in order to reduce the exposure of the population and aquatic biota to these endocrine-disrupting compounds.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China.
Nandong
N
Xue
Xiaobai
X
Xu
Zuliang
Z
Jin
D002681:China; D052244:Endocrine Disruptors / Q000032:analysis*; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D052244:Endocrine Disruptors; D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D014874:Water Pollutants, Chemical