| 超声波辅助分散液相微萃取-气相色谱联用分析菌核净 |
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| 引用本文： | 阮淑呈,杨亚玲,黄海涛.超声波辅助分散液相微萃取-气相色谱联用分析菌核净[J].分析试验室,2010,29(1). |
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| 作者姓名： | 阮淑呈 杨亚玲 黄海涛 |
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| 作者单位： | 1. 云南烟草科学研究院烟草化学研究室,昆明,650106
2. 昆明理工大学生命科学与技术学院,昆明,650224 |
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| 摘 要： | 将超声波萃取(USE)与分散液-液微萃取(DLLME)联合,利用气相色谱-电子捕获检测(GC-ECD),建立了一种高灵敏度检测水体中菌核净的新方法。对萃取的条件进行优化,选定萃取条件为:在5 mL样品中,注入1 mL丙酮和0.1 mL的四氯化碳混合液,20 Hz超声10 min,振荡混匀后高速离心5 min,移出下层溶剂低温吹干以丙酮定容自动进样分析。在优化条件下,样品的富集倍数可达50倍,检出限为0.001μg/mL,对采于蔬菜地边的水样进行加标回收率实验,平均回收率在81%以上,相对标准偏差在4.3%~7.6%之间,方法可满足水样中菌核净农药残留的检测要求。
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| 关 键 词： | 超声波萃取 分散液-液微萃取 气相色谱 菌核净 |
Analysis of dimethachlon by ultrasonic-extraction with dispersive liquid-liquid microextraction coupled with gas chromatography |
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| RUAN Shu-cheng,YANG Ya-ling,HUANG Hai-tao.Analysis of dimethachlon by ultrasonic-extraction with dispersive liquid-liquid microextraction coupled with gas chromatography[J].Chinese Journal of Analysis Laboratory,2010,29(1). |
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| Authors: | RUAN Shu-cheng YANG Ya-ling HUANG Hai-tao |
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| Institution: | 1.College of Life Science and Technology;Kunming University of Science and Technology;Kunming 650224;2.Research of Tobacco Chemical;Yunnan Tobacco Institute of Science and Technology;Kunming 650106 |
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| Abstract: | A nove1 method was developed for the determination of dimethachlon by ultrasonic extraction(USE) with dispersive liquid-liquid microextraction(DLLME) coupled with capillary gas chromatography with electron capture detection(GC-ECD).Some important parameters that influence the extraction efficiency,such as the kind of the extraction and disperser solvent,their volume and the extraction time were investigated.In the method,1.0 mL of acetone and 0.1 mL of carbon tetrachloride were rapidly injected into a 5.0 m... |
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| Keywords: | Ultrasonic extraction Dispersive Liquid-liquid microextraction Gas chromatography Dimethachlon |
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