Synthesis and Application of Novel Modified Magnetic Nanocomposite for Solid Phase Extraction of Thallium(I) Ions

سال انتشار: 1396
محل انتشار: مجله تحقیقات شیمی تجزیه و تجزیه زیستی، دوره: 4، شماره: 2
کد COI اختصاصی: JR_ANALCH-4-2_001
زبان مقاله: انگلیسی
تعداد مشاهده: 116

نویسندگان

Young Researchers and Elite Club, Kerman Branch, Islamic Azad University, Kerman, Iran

چکیده

In this paper, magnetically multiwalled carbon nanotubes (MMWCNTs) nanocomposite modified by methyl-۲-[۲-(۲-۲-[۲-(methoxycarbonyl) phenoxy] ethoxyethoxy) ethoxy] benzoate was applied for magnetic solid-phase extraction (MSPE) of thallium(I) ions. Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) spectrometry and vibrating sample magnetometer (VSM) were used to characterize the magnetic sorbent. The effects of as pH, sample volume, eluent, and interfering ions were studied. Under the optimized conditions, the preconcentration factor of ۱۰۰ and the linear response over ۳−۲۸۰ µg L−۱ were obtained. The detection limit of the suggested procedure (LOD, ۳Sb/m) was found to be ۰.۵۹ µg L−۱. The relative standard deviation for six replicate detection of ۱۰۰ µg L−۱ of Tl(I) was ±۱.۹%. Finally, the developed method was utilized for the determination of thallium(I) ions in different real samples with recoveries in the range of ۹۶.۹–۱۰۲.۲% for the spiked samples. The proposed MSPE method exhibited some advantages, such as simplicity, rapidity, high sensitivity and excellent precision. In addition, the mechanism of thallium extraction by modified nanocomposite was proposed.

کلیدواژه ها

Magnetic solid phase extraction, Nanocomposite, Thallium(I), Multiwalled carbon nanotubes, Flame atomic absorption spectrometry, heavy metals

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