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
| Autor: | Elham Ashrafzadeh Afshar, Hamid Fazelirad, Mohammad Ali Taher |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Nanocomposite
Sorbent Materials science 010401 analytical chemistry Extraction (chemistry) Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Mass spectrometry 01 natural sciences 0104 chemical sciences Analytical Chemistry law.invention Linear range chemistry law Thallium Fourier transform infrared spectroscopy 0210 nano-technology Atomic absorption spectroscopy |
| Zdroj: | Microchimica Acta. 184:791-797 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-016-2040-z |
| Popis: | 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 was combined with electrothermal atomic absorption spectrometry to determine ultra-trace amounts of thallium(I). The nanocomposite was characterized by Fourier transform infrared spectroscopy, X-ray diffraction spectrometry, field emission scanning electron microscopy and transmission electron microscopy. Under the optimized conditions, a dynamic linear range from 7.0 to 435 ng L−1, a detection limit of 1.8 ng L−1 and a quantification limit of 6.0 ng L−1 were obtained. Also, the intra- and inter-day relative standard deviations for 20.0 ng mL−1 Tl(I) were calculated as ±4.8% and ±5.1%, respectively. The adsorbent was applied to the determination of thallium(I) in the environmental, biological and standard samples with satisfactory results. |
| Databáze: | OpenAIRE |
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