On-line Micro-Packed Column Solid-Phase Extraction of Cadmium Using Metal-Organic Framework (MOF) UiO-66 with Posterior Determination by TS-FF-AAS

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

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

• 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: National Institute of Science and Technology in Bioanalysis
• Grantee: Marco Aurelio Zezzi Arruda
• Support Opportunities: Research Projects - Thematic Grants