Organophosphorus halloysite nanotubes as adsorbent for lead preconcentration in wine and grape juice
| Autor: | Laís Helena Sousa Vieira, Fernando Lima de Menezes, Lillian Maria Uchoa Dutra Fechine, Gisele S. Lopes, Odair Pastor Ferreira, Tiago M. Freire, Rafael M. Freire, Lauren L. Ramos, Pierre Basílio Almeida Fechine, Giovanna R. Cavalcante, Francisco L.F. da Silva, Juliano C. Denardin, Allan M. Santana, Wladiana O. Matos |
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| Rok vydání: | 2021 |
| Předmět: |
Wine
Chromatography Chemistry 020101 civil engineering Geology 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Halloysite 0201 civil engineering law.invention Adsorption Geochemistry and Petrology law engineering 0210 nano-technology Atomic absorption spectroscopy |
| Zdroj: | Applied Clay Science. 200:105912 |
| ISSN: | 0169-1317 |
| DOI: | 10.1016/j.clay.2020.105912 |
| Popis: | Preconcentration of Pb(II) in grape-based beverages using organophosphate-functionalized halloysite nanotubes was investigated by flame atomic absorption spectroscopy (FAAS). For this proposal, a central composition design (CCD) was performed for an optimum experimental condition on Pb(II) preconcentration procedure, pH 7.5, preconcentration time of 7.5 min and adsorbent mass of 40 mg. The detection and quantification limit values were calculated as 12 and 40 μg kg−1, respectively. Additionally, considering Pb(II) tolerable recovery, the nanotubes could be reuse for six cycles. The preconcentration method was applied to wine and grape juice samples and concentrations below LOD were found for all samples. The proposed methodology presented great accuracy and limits compatible with current legislation, since spike/recovery tests were performed, and quantitative recoveries were obtained. |
| Databáze: | OpenAIRE |
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