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http://hdl.handle.net/2074/1032
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| Title: | Silica gel functionalized with resacetophenone: synthesis of a new chelating matrix and its application as metal ion collector for their flame atomic absorption spectrometric determination as metal ion collector for their flame atomic absorption spectrometric determination |
| Authors: | Goswami, Anupama
Singh, Ajai K |
| Keywords: | Resacetophenone
Silica gel
Preconcentration
Chelating matrix
Metal ions
Atomic absorption spectrometry |
| Issue Date: | 2002 |
| Citation: | Analytica Chimica Acta, 454(2), 229-240 |
| Abstract: | Silica gel modified with 3-aminopropyltriethoxysilane was anchored with resacetophenone to prepare a new chelating surface (or matrix). It was characterized with cross polarization magic angle spinning 13C NMR spectroscopy and diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy and used for the separation and preconcentration of Cu(II), Pb(II), Ni(II), Fe(III), Cd(II), Zn(II) and Co(II) prior to their determination by flame atomic absorption spectrometry (FAAS). The optimum pH ranges for quantitative sorption are 6.0–7.5, 5.5–7.5, 5.0–7.0, 6.5–7.5, 6.0–7.5, 6.0–7.0 and 6.0–7.5 for Cu, Pb, Fe, Zn, Co, Ni and Cd, respectively. All the metals can be desorbed with 3 mol dm−3 HCl or HNO3. The sorption capacity for these metal ions is in range of 57.8–365.0 μmol g−1 of chelating matrix. Tolerance limits for electrolytes NaNO3, NaCl, NaBr, Na2SO4 and Na3PO4 and cations Ca(II) and Mg(II) in the sorption of these metal ions are reported. Preconcentration factors of 200, 300, 150... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/1032 |
| Appears in Collections: | Chemistry
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