High performance liquid chromatographic determination of pesticides in soluble phase and suspended phase in river water |
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| Authors: | Hideko Mitobe Tsuyoshi Ibaraki Akiko Tanabe Kuniaki Kawata Akio Yasuhara |
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| Institution: | 1. Niigata Prefectural Institute of Public Health and Environmental Sciences , 314–1 Sowa, Niigata, 950–2144, Japan;2. Niigata Prefectural Institute of Public Health and Environmental Sciences , 314–1 Sowa, Niigata, 950–2144, Japan Phone: +81–25–263–9410 E-mail: kkawata@mail.goo.ne.jp;3. The National Institute for Environmental Studies , 16–2 Onogawa, Tsukuba, Ibaraki, 305–0053, Japan |
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| Abstract: | A high performance liquid chromatographic method has been developed to determine pesticides in river water as both dissolved phase and suspended phase. The target pesticides were eight herbicides, asulam, diuron, flazasulfuron, linuron, MCPB, mecoprop, pyrazosulfuron‐ethyl and siduron, and two fungicides, oxine‐copper and thiram. The pesticides in filtered river water were extracted with styrene‐divinylbenzene copolymer and were eluted with acetonitrile. The pesticides on suspended solids were extracted ultrasonically with acetonitrile. Each eluate was concentrated and analyzed by HPLC with multiwavelength detector. Recoveries of the pesticides in the overall procedure of this method were 78–114% for filtered river water and 75–107% for suspended solids. The limits of detection in water and suspended solids ranged from 0.1 to 0.9 μg/L and 1 to 7 μg/g, respectively. Pesticide distribution between soluble phase and suspended phase in river water was measured by this method. |
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| Keywords: | Herbicide HPLC Pesticide River water Suspended solid Solid‐phase extraction |
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