Determination of chlorophenols in water samples using simultaneous dispersive liquid–liquid microextraction and derivatization followed by gas chromatography-electron-capture detection

2007 ◽  
Vol 1157 (1-2) ◽  
pp. 23-29 ◽  
Author(s):  
Nazir Fattahi ◽  
Yaghoub Assadi ◽  
Mohammad Reza Milani Hosseini ◽  
Elham Zeini Jahromi
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Water Samples ◽  
Electron Capture Detection ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

scholarly journals Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop Followed by Gas Chromatography-Electron Capture Detector for Determination of Some Pesticides in Water Samples

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Mostafa Bashiri Juybari ◽  
Ali Mehdinia ◽  
Ali Jabbari ◽  
Yadollah Yamini
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Water Samples ◽  
Electron Capture Detection ◽  
Extraction Solvent ◽  
Relative Standard ◽  
Pesticides In Water ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

In this study dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFO) followed by gas chromatography-electron capture detection (GC-ECD) was developed for determination of some pesticides in the water samples. Some important parameters, such as type and volumes of extraction and disperser solvent and salt effect on the extraction recovery of analytes from aqueous solution were investigated. Under the optimum conditions (extraction solvent: 1-undecanol, 15.0 μL; disperser solvent: acetone, 1.0 mL, and without salt addition), the preconcentration factors were obtained ranged from 802 to 915 for analytes. The linear ranges were from 0.05 to 100 μg L−1, and detection limits ranged from 0.05 to 0.008 μg L−1. The relative standard deviations (RSDs%, ) were between 3.2% and 6.7%. The proposed method was successfully applied to the determination of target analytes in the tap, sea, and river water samples, and satisfactory recoveries were obtained.

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