Application of DLLME Based on the Solidification of Floating Organic Droplets for the Determination of Dinitrobenzenes in Aqueous Samples |
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| Authors: | Yanlin Wu Liping Dai Jing Cheng Feng Guo Junkai Li |
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| Institution: | 1. Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
2. School of Agriculture, Yangtze University, Jinzhou, 434025, China
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| Abstract: | Dispersive liquid–liquid microextraction (DLLME) based on the solidification of floating organic droplets (DLLME-SFO) combined with gas chromatography-electron-capture detection (GC–ECD) has been developed for extraction and analysis of three dinitrobenzenes. The extraction conditions including extraction solvent, disperser solvent, extraction time, salt effect and temperature were investigated and optimized systematically. The limits of detection were 0.019 μg L?1 for 1,4-dinitrobenzene, 0.079 μg L?1 for 1,3-dinitrobenzene and 0.034 μg L?1 for 1,2-dinitrobenzene. Moreover, it offered good repeatability and high recovery. This method was successfully applied to monitor DNBs in different water samples. |
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