Ultra-trace determination of thallium(I) using a nanocomposite consisting of magnetite, halloysite nanotubes and dibenzo-18-crown-6 for preconcentration prior to its quantitation by ET-AAS
作者： Elham Ashrafzadeh Afshar , Mohammad Ali Taher , Hamid Fazelirad
DOI: 10.1007/S00604-016-2040-Z
关键词:
摘要: A nanocomposite modified with dibenzo-18-crown-6 was synthesized and applied as a new sorbent for the preconcentration of thallium(I) via ultrasound assisted-solid phase extraction. This extraction step combined electrothermal atomic absorption spectrometry to determine ultra-trace amounts thallium(I). The characterized by Fourier transform infrared spectroscopy, X-ray diffraction spectrometry, field emission scanning electron microscopy transmission microscopy. Under optimized conditions, dynamic linear range from 7.0 435 ng L−1, a detection limit 1.8 ng L−1 a quantification 6.0 ng L−1 were obtained. Also, intra- inter-day relative standard deviations 20.0 ng mL−1 Tl(I) calculated ±4.8% ±5.1%, respectively. adsorbent determination in environmental, biological samples satisfactory results.
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