Solid Phase Dynamic Extraction Based on Polypyrrole Fiber  for Determination Trace Amount of Atrazine in Aqueous Samples with GC-MS

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Rouhi, Zahra | 2008

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39401 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Bagheri, Habib
Abstract:
This research is a bout a novel sample prepration procedure that used polypyrrole film into a stainless steel needle as a fiber coating for solid phase dynamic extraction(SPDE) with using a home-made SPDE devise and gas chromatography – mass spectroscopy for the extraction and detectionof Atrazine from the aqueous sample in direct mode of SPDE. Polypyrrole film was directly electrodeposited into the needle in a aqueous sodium dodecyl sulfonate solution with pecial set up in optimom condition of potential, time and concentration of polypyrrole. To enhance the sensitivity of the SPDE , variables affecting adsorption and desorption steps such as temperature,time,PH, flowrate and ionic strength of solution were optimized. In the optimom condition detection limit(S/N=3) and relative standard deviation (n=6) were 15ng/l and 13.7%. This fiber strongly compete with commercial ones.some advantages of this method are speed, negligible volume of solvent,high prosity of solid phase and inexpensive fiber with long life. The optimized method was applied to real water sample of Zayandehrud river and no Atrazine were detected
Keywords:
Gas Chromatography/Mass Spectrometry (GC/MS) ; Polypyrrole ; Microextraction ; Atrazine ; In-Needle Extraction