• 한국환경과학회지
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• 제24권12호
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• pp.1569-1582
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• 2015

The analytical method for 16 organophosphorus pesticides was developed in this study. The 16 organophosphorus pesticides were analyzed by liquid chromatography-tandem mass spectrometry (LC/MS/MS) using on-line solid phase extraction (on-line SPE) with PLRP- S cartridge. Analysis of all analytes in the MS/MS was processed in the electrospray ioni-zation (ESI) positive mode. They are Azinphos ethyl, Chlorfenvinphos, Ethion, Famphur, Phosmet, Phosphamidon, Terbufos, Aspon, Chlorpyrifos-methyl, Crotoxyphos, Dichlofenthi-on, Dicrotophos, Fonofos, Thionazin, Dimethoate and Iprobenfos. Limits of detection (LODs) and Limits of quantification(LOQs) were obtained as 0.8~2.0 ng/L and 2.6~6.4 ng/L, respectively. All compounds were not detected at the 8 sampling points of the raw water and clean water.

• 해양환경안전학회지
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• 제15권1호
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• pp.1-9
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• 2009

2006년 5월부터 9월까지 아산만의 유기인계 농약의 분포특성에 대해 조사하였다, 조사기간 중 표층수와 부유입자 시료에서 28개의 유기인계 농약이 검출되었다. 조사해역의 표층수에서 가장 많이 존재하는 유기인계 농약은 IBP와 DDVP로 각각 N.D.${\sim}$014.4, 3.2${\sim}$696.3 ng/L의 농도로 측정되었다. 유기인계 농약은 아산만에서 7월과 8월에 가장 높은 농도분포를 보였으며, 이는 농약의 사용 및 강수와 관계가 있었다. 조사 해역에서 유기인계 농약은 상류에서 하류로 갈수록 농도가 뚜렷이 감소하여 육상기원 잔류농약이 연안의 해양환경내로 유입된 후 분해 희석됨을 보여주었다. 조사기간 중의 아산만 해역의 유기인계 농약의 분포는 다른 지역에서 조사된 것 보다 높은 농도를 보였다, 검출된 유기인계 농약의 농도는 우리나라 해역의 수질기준 중 유기인계 농약의 잔류 허용치를 넘지 않았다. 분석된 유기인계 농약 중 DDVP, IBP, Diazinon, Phorate, Azinphos ethyl, Chlorfenvinfos는 부유입자에 흡착하는 성질이 다른 농약보다 큰 것으로 나타났고 흡착계수 $(K_d)$는 Log $K_ow$와 밀접한 관계가 있었다.

• Ocean and Polar Research
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• 제32권3호
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• pp.203-212
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• 2010

Distribution of organophosphorous pesticides (OPs) was studied from February to September 2008 in the seawater of Asan Bay, Korea. Among the 29 types of OPs detected during the study period, IBP(S-benzyl O,O-diisopropyl phosphorothioate), ranging from <1 ng/l to 377 ng/l, was the most abundant. Other commonly observed OPs concentrations in the study area included diazinon (Diethyl 2-isopropyl-4-methyl-6-pyrimidinyl phosphorothionate; <1~307 ng/l), azinphos ethyl (3,4-Dihydro-4-oxo-3-benzotriazinylmethyl O,O-diethyl phosphorodithioate; <1~1997 ng/l), malathion (1,2-Di(ethoxycarbonyl)ethyl O,Odimethyl phosphordithioates; <1~3013 ng/l), demeton-O (Diethyl 2-(ethylthio)ethyl phosphorothionate; <1~2403 ng/l), and DDVP (2,2-dichlorovinyl dimethyl phosphate; <1~283 ng/l). Seasonal distribution of OPs in seawater is dependent on the OP application period. In August, OPs concentrations were generally decreased with the increased salinity of seawater, implying progressive dilution of pesticides in the estuarine system. OPs were deposited into Asan Bay from Asan and Sabkyo Lakes as well as surrounding tributaries. Ten OPs, including diazinon, were detected in the suspended particles of Asan Bay.