| 液-液萃取富集-气相色谱法测定水中有机氯农药和多氯联苯 |
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| 引用本文： | 王娜.液-液萃取富集-气相色谱法测定水中有机氯农药和多氯联苯[J].理化检验(化学分册),2011(3). |
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| 作者姓名： | 王娜 |
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| 作者单位： | 国土资源部沈阳地质矿产研究所; |
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| 摘 要： | 采用正己烷作萃取溶剂提取并富集水样中有机氯农药(OCP's)和多氯联苯(PCB's),所得提取液经浓缩至约0.5mL并定容至1.0mL后,用气相色谱法-电子捕获检测器测定水中有机氯农药和多氯联苯。采用Rtx-5MS和Rtx-1701双柱法根据与标准物质的保留时间相对比进行定性分析;采用Rtx-5MS柱对被测组分按外标法进行定量分析。结果表明:各种农药质量浓度均在0.5～40μg·L~(-1)范围内与峰面积呈线性关系。有机氯农药和多氯联苯的检出限(3s)在0.001 1～0.004 7μg·L~(-1)之间。用标准加入法测得其回收率在83.3%～112.1%之间,相对标准偏差(n=7)在4.4%～9.4%之间。
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| 关 键 词： | 气相色谱法 液-液萃取 有机氯农药 多氯联苯 水 |
GC Determination of Organochlorine Pesticides and Polychloro-Biphenyls in Water with Enrichment by Liquid-Liquid Extraction |
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| WANG Na.GC Determination of Organochlorine Pesticides and Polychloro-Biphenyls in Water with Enrichment by Liquid-Liquid Extraction[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2011(3). |
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| Authors: | WANG Na |
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| Institution: | WANG Na (Shenyang Research Institute of Geology and Mineral Resources,The Ministry of Land and Resources,Shenyang 110032,China) |
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| Abstract: | GC chromatography with electron capture detector was applied to the determination of organochlorine pesticides(OCP's) and polychloro-biphenyls(PCB's) in water.OCP's and PCB's were separated and enriched from water sample by extraction with n-hexane.The extract was concentrated to about 0.5 mL and diluted to 1.0 mL with n-hexane.The double caplillary chromatographic column technique,i.e.use of 2 columns of different polarity(the Rtx-5MS column and the Rtx-1701 column) was adopted in separation and identifica... |
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| Keywords: | Gas chromatography Liquid-liquid extraction Organochlorine pesticides Polychloro-biphenyls Water |
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