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| 1 | Determination of HCH and DDT in soils following Wenchuan 5.12 Violent Earthquake in China显示文摘A large number of disinfectants and insecticides were used on a large scale after the Wenchuan 5.12 Violent Earthquake. The disinfectants and insecticides, including HCH (hexachlorocyclohexane) and DDT (dichlorodiphenyltrichoroethane) as representative OCPs, could lead to serious environmental problems. In order to disclose the residues of HCH and DDT in soils following the Wenchuan 5.12 Violent Earthquake, surface soils in Dujiangyan City and Beichuan County were sampled in 2009. The samples were analyzed by GC/MS after pre- treatment by ultrasonic solvent extraction. It has been found that the concentra-tions of γ-HCH, β-HCH and 4,4'-DDT in soils of Beichuan County were 94–102.4, 14.1–36.1 and 2.9–4.3 times high their concentrations in those of the Wolong Nature Reserve, and the concentrations in soils of Dujiangyan City were 52.4–61.6, 8.8 –45.3 and 5.4–6.2 times high their concentrations in soils of the Wolong Nature Reserve, respectively. According to the isomers of HCHs and metabolites of DDTs, it could be concluded that these areas may have additional inputs of lindane and 4,4'-DDT. | CUI Weiwei ZHANG Qiangbin ZHU Xianlei WAN Yunyang ZHANG Zhihuan FAN Zhihua WANG Tieguan | 2011 | Chinese Journal Of Geochemistry2011，30，1： | 2 |
| 2 | 邕江流域有机氯农药残留问题的初步研究显示文摘采用固相萃取和GC-ECD对邕江流域水体中17种痕量有机氯农药的残留状况进行分析测定,检测结果表明,邕江干流均检出硫酸硫丹,但有机氯农药浓度较低,均未超过现有相关标准。城市内河残留的有机氯农药以六六六为主,主要来自于长期的历史残留,而硫酸硫丹除朝阳溪和相思湖丰水期未检测到外,均普遍检出。方法检出限为1-5ng/L,替代物加标回收率为103.5%-112.0%。 | 吴烈善 梁柳玲 邓超冰 廖平德 许桂苹 田艳 | 2009 | 中国环境监测2009，25，6： | 1 |
| 3 | 桑沟湾水体中有机氯农药时空分布特征显示文摘利用气相色谱法分析并结合外标法,定量测定2009年4个航次桑沟湾海域水体中8种有机氯农药的质量浓度,探讨了有机氯污染物在该海域组成以及时空分布特征。结果表明,DDTs类农药是桑沟湾水体中主要的有机氯农药种类。该海域有机氯农药质量浓度分布特征呈现8月份较高,10月和12月份次之,4月份最低。与其他海域相比,其有机氯农药质量浓度处于中等水平。桑沟湾的水体中HCHs和DDTs质量浓度均符合国家一类海水质量标准。 | 白红妍 韩彬 孙丕喜 郑立 王江涛 王小如 | 2013 | 海岸工程2013，32，1： | 0 |
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