Determination of chlorpyrifos in environmental water samples by dispersive liquid–liquid microextraction with solidification of a floating organic drop followed by gas chromatography with flame photometry detection

2012 ◽  
Vol 4 (10) ◽  
pp. 3246 ◽  
Author(s):  
Jianfei Xiong ◽  
Zhuo Guan ◽  
Guangming Zhou ◽  
Xiangyu Tang ◽  
Yujuan Lv ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Water Samples ◽  
Environmental Water ◽  
Flame Photometry ◽  
Environmental Water Samples ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Dispersive Liquid-Liquid Microextraction Coupled with Gas Chromatography for the Determination of Orthochlorophenol in Environmental Water Samples

2012 ◽  
Vol 518-523 ◽  
pp. 1379-1382
Author(s):  
Ying Chun Yang ◽  
Qian Sun ◽  
Chong Shu Yi ◽  
Zhi Xiang Ye ◽  
Li Mo
Keyword(s):  
Gas Chromatography ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Extraction Solvent ◽  
Salt Addition ◽  
Relative Standard ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

A rapid and effective method, the dispersive liquid-liquid microextraction(DLLME) with gas chromatography, has been developed for the extraction and determination of OCP in environmental water samples. The factors relevant to the efficiency of DLLME were investigated and optimized. Under the optimum conditions, such as 150μL of dichloromethane as extraction solvent, 1.2 mL acetone as dispersive agent, 8 minutes extraction time, and without salt addition, the linear response of this method was in the range of 0.5～5000μg L−1 (r = 0.9981), the relative standard deviation (RSD) for 500μg L−1 and 1000μg L−1 of OCP was 5.2% and 12.6% (n = 6), respectively. The detection limit (3σ) was 0.08 μg L−1. The developed method was successfully applied to the determination of trace amount of OCP in three kinds of real environmental water samples, the spiked recoveries were in the range of 87.4%～108.0%.

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