Development and validation of an analytical methodology for quantification of Al in alumina-based materials by 27Al Solid-state nmr
International Journal of Development Research
Development and validation of an analytical methodology for quantification of Al in alumina-based materials by 27Al Solid-state nmr
Received 14th December, 2020; Received in revised form 25th January, 2021; Accepted 10th February, 2021; Published online 17th March, 2021
Copyright © 2021, Luizianne P. Alves et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In this work, a simple protocol for counting the Al spins present in diamagnetic materials used as carriers and catalysts based on 27Al solid-state nuclear magnetic resonance using routine 4 mm rotors was developed and validated. The acquisition parameters were optimized, and validation tests were performed using a standard sample of γ-alumina with a known aluminium concentration. The validation results indicated that solid-state NMR can be used for the quantification of quadrupolar aluminium (mmol Al.g-1 material) in diamagnetic materials by employing non-special tools with satisfactory results, similar to the NMR quantitative analysis of dipolar nuclei in solids.
