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Determination of 2,4-D in environmental samples by three phases directly suspended LPME combined with HPLC-UV
, Article Analytical Methods ; Volume 3, Issue 10 , 2011 , Pages 2261-2267 ; 17599660 (ISSN) ; Roshan, S ; Asgharinezhad, A. A ; Najafi, E ; Abedi, H ; Tavassoli, N ; Lotfi Zadeh Zhad, H. R ; Sharif University of Technology
Abstract
Experimental design of directly suspended droplet liquid-liquid-liquid microextraction has been used to determine residue of 2,4-D, in environmental water samples. A free suspended droplet of 5.5 μL of receiving phase is delivered to the top-center position of 1-Octanol, which is an immiscible organic solvent, floating on the top of a 2.5 mL aqueous sample while being agitated by a stirring bar to create a mild vortex at the center of the vial. Central composite rotatable design has been used for studying the effect of the parameters, the factors interacting with each other and finding the optimum condition. The chromatographic separation was accomplished on a shim-Pak C18 column using a...