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Research Article

Development of a green analytical chemistry method for off-line preconcentration of nickel in water and sediments samples with mini-column with bamboo fibres

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Pages 8454-8464 | Received 09 Aug 2021, Accepted 23 Sep 2021, Published online: 20 Oct 2021
 

ABSTRACT

In this work, is proposed an analytical method for the determination of nickel in natural water and sediment samples using solid-phase extraction with a mini-column of bamboo fibres modified with 5-Br-PADAP and determination by flame atomic absorption spectrometry. Applying the characterisation techniques of fresh bamboo fibre aimed to define the morphology of the fibre and its physical characteristics. Turning to the optimisation of the variables for the adsorptive process of nickel. The system allows the determination of nickel with a limit of detection (LOD) of 0.75 μg L−1 and a limit of quantitation (LOQ) of 2.50 μg L−1. The precision was expressed as a relative standard deviation (RSD) of 3.4 and 3.8% for a nickel concentration of 20.0 and 50.0 μg L−1 respectively. The value of 78.0 was determined as the value for the enrichment factor. The accuracy was confirmed with spike tests with recuperations varying from 91% to 106% and 93% to 104% for water and sediment samples, respectively, and by comparison with the certified sample. The procedure was applied for nickel determination in natural water and sediment samples. The achieved concentrations varied from 4.0–53.2 and 3.7–55.8 µg L−1 for water and sediment samples, respectively.

Acknowledgments

The authors are grateful to Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for providing grants and fellowships and financial support.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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