| Full text | |
| Author(s): |
Ana Carla R. Carneiro
[1]
;
Joziane G. Meneguin
[2]
;
Paula M. dos Santos
[3]
;
Marcela Z. Corazza
[4]
;
Maiyara Carolyne Prete
[5]
;
Andrelson Wellington Rinaldi
[6]
;
César Ricardo T. Tarley
Total Authors: 7
|
| Affiliation: | [1] Universidade Estadual de Londrina. Departamento de Química - Brasil
[2] Universidade Estadual de Londrina. Departamento de Química - Brasil
[3] Universidade Estadual de Londrina. Departamento de Química - Brasil
[4] Universidade Estadual de Londrina. Departamento de Química - Brasil
[5] Universidade Estadual de Londrina. Departamento de Química - Brasil
[6] Universidade Estadual de Maringá. Departamento de Química - Brasil
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Chemical Society; v. 33, n. 8, p. 958-968, 2022-06-15. |
| Abstract | |
Metal-organic framework (MOF) UiO-66 was synthesized and evaluated as solid-phase extractor support for cadmium preconcentration in a micro-flow injection system coupled to thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) detection. The adsorbent was characterized by X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Raman spectroscopy, and textural data from N2 adsorption/desorption isotherm data. The optimized conditions were achieved by loading 10.0 mL of a sample, containing 0.05 mol L-1 of phosphate buffer solution at pH 8.0, at a high flow rate of 10.0 mL-1 through 20.0 mg of UiO-66 packed into a mini-column, followed by elution with 1.0 mol L-1 HCl. At these conditions, the method presented a preconcentration factor of 35.7, limit of detection of 0.03 µg L-1 and a dynamic linear range from 0.1 to 8.0 µg L-1. The adsorption performance of UiO-66 towards cadmium was not influenced by Pb2+, Hg2+, Fe2+, Co2+, Cu2+, Ni2+, Zn2+, Mg2+ and Ca2+ ions. Analysis of different waters samples (tap water, physiological solution, mineral water, and lake water) was carried out without matrix interference, yielding recovery values ranging from 92.0 to 111.9%. (AU) | |
| FAPESP's process: | 14/50867-3 - Inct 2014 - de bioanalitica. |
| Grantee: | Marco Aurelio Zezzi Arruda |
| Support Opportunities: | Research Projects - Thematic Grants |