|
|
EPrints@IIT Delhi >
Faculty Research Publicatons >
Chemistry >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/2074/1205
|
| Title: | 8-Hydroxyquinoline anchored to silica gel via new moderate size linker: synthesis and applications as a metal ion collector for their flame atomic absorption spectrometric determination |
| Authors: | Goswami, Anupama
Singh, Ajai K
Venkataramani, B |
| Keywords: | Silica gel
Chelating
Ligand
8-Hydroxyquinoline
Atomic absorption spectrometry
Sorption
Preconcentration
Metal ions
Determination |
| Issue Date: | 2003 |
| Citation: | Talanta, 60(6), 1141-1154 |
| Abstract: | The silica gel modified with (3-aminopropyl-triethoxysilane) was reacted with 5-formyl-8-hydroxyquinoline (FHOQx) to anchor 8-quinolinol ligand on the silica gel. It was characterised with cross polarisation magic angle spinning (CPMAS) NMR and diffuse reflectance infrared Fourier transformation (DRIFT) spectroscopy and used for the 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. The surface area of the modified silica gel has been found to be 227 m2 g−1 and the two pKa values as 3.8 and 8.0. The optimum pH ranges for quantitative sorption are 4.0–7.0, 4.5–7.0, 3.0–6.0, 5.0–8.0, 5.0–8.0, 5.0–8.0 and 4.0–7.0 for Cu, Pb, Fe, Zn, Co, Ni and Cd, respectively. All the metals can be desorbed with 2.5 mol l−1 HCl or HNO3. The sorption capacity for these metal ions is in range of 92–448.0 μmol g−1 and follows the order Cd<Pb<Zn<Co<Ni<Fe<Cu. Tolerance limits for electrolytes NaNO3, NaCl, NaBr, N... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/1205 |
| Appears in Collections: | Chemistry
|
Files in This Item:
| File |
Description |
Size | Format |
|---|
| goswamihyd2003.pdf | | 422Kb | Adobe PDF | View/Open |
|
Show full item record
All items in DSpace are protected by copyright, with all rights reserved.
|
