| Title: | Development of a new and environment friendly hollow fiber-supported liquid phase microextraction using vesicular aggregate-based supramolecular solvent |
| Author(s): | Moradi M; Yamini Y; Rezaei F; Tahmasebi E; Esrafili A; |
| Address: | "Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box: 14115-175, Tehran, Iran" |
| ISSN/ISBN: | 1364-5528 (Electronic) 0003-2654 (Linking) |
| Abstract: | "Hollow fiber-based liquid phase microextraction (HF-LPME) using conventional solvents is limited by their relative instability and high volatility. The use of supramolecular solvents as a liquid membrane phase could overcome these inconveniences due to their negligible vapour pressure and high viscosity. In the present study, a novel and highly flexible method was developed based on supramolecular solvents constructed of vesicles of decanoic acid, which were used for the first time as a solvent in HF-LPME. This solvent is produced from the coacervation of decanoic acid aqueous vesicles by the action of tetrabutylammonium (Bu(4)N(+)). In this work, halogenated anilines as model compounds were extracted from water samples into a supramolecular solvent impregnated in the pores and also filled inside the porous polypropylene hollow fiber membrane. The extracted anilines were separated and determined by high-performance liquid chromatography. The technique requires minimal sample preparation time and toxic organic solvent consumption, and provides a significant advantage over conventional analytical methods. The important parameters influencing the extraction efficiency were studied and optimized utilizing two different optimization methods: one variable at a time and the Box-Behnken design. Under the optimum conditions, the preconcentration factors were in the range of 74 to 203. Linearity of the method was obtained in the range of 1.0-100 mug L(-1) with the correlation coefficients of determination (R(2)) ranging from 0.9901 to 0.9986. The limits of detection for the target anilines were 0.5-1.0 mug L(-1). The relative standard deviations varied from 3.9% to 6.0%. The relative recoveries of the three halogenated anilines from water samples at a spiking level of 20.0 mug L(-1) were in the range of 90.4-107.4%" |
| Keywords: | "Aniline Compounds/*analysis Chromatography, High Pressure Liquid Decanoic Acids/*chemistry Equipment Design Liquid Phase Microextraction/*instrumentation/*methods Macromolecular Substances/chemistry Particle Size Polypropylenes/*chemistry Porosity Quatern;" |
| Notes: | "MedlineMoradi, Morteza Yamini, Yadollah Rezaei, Fatemeh Tahmasebi, Elham Esrafili, Ali eng England 2012/06/27 Analyst. 2012 Aug 7; 137(15):3549-57. doi: 10.1039/c2an35304k. Epub 2012 Jun 25" |
