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عنوان دوره: اولین همایش ملی توسعه فناوری نانو در علوم پایه و مهندسی

کد مقاله : 1024-DNBSE

¹لرستان، خرم آباد، دانشگاه لرستان، دانشکده علوم پایه

²لرستان،خرم آباد، دانشگاه لرستان، دانشکده علوم پایه

³لرستان، خرم آباد، دانشگاه لرستان ، دانشکده علوم پایه

⁴مراغه ، دانشگاه مراغه

A technique was developed for magnetic fiber headspace-solid phase microextraction (MF-HS-SPME) of volatile organic compounds (BTEXs). The efficiency of the extraction of a steel SPME fiber coated with an 6D improved after its magnetization during HS-SPME. The effects of magnetic field strength, extraction temperature, extraction time, moisture content of the sample, desorption time and desorption temperature were optimized using a simplex method. The BTEXs (specifically benzene, toluene, ethyle benzene, xylene ) were then quantified by GC-FID analysis. Comparison of an AC magnetic field and a DC magnetic field indicated the superior effect of the AC magnetic field for the target analytes. The limits of detections of the BTEXs are between 3.1 – 21.7 by using the AC magnetic field. Relative standard deviations of 2.9 to 3.88%were obtained for six replicated analyses of the analytes. The method was applied to some polluted soil samples, and satisfactory results were obtained.

Magnetism . Solid-phase microextraction . volatile organic compounds . AC magnetic field . DC magnetic field HS-SPME (؛ )

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