Sorption Preconcentration of Rare Earth Elements on N-Methylpyrrolidone-Functionalized Graphene for ETV-ICP-OES Analysis of Aqueous Solutions

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This research aims to develop a simplified analytical technique for determining rare earth elements in water and industrial effluents.
Novel graphene matrix functionalized with N-methylpyrrolidone used as solid-phase extractant.
Electrothermal vaporization inductively coupled plasma—optical emission spectrometry (ETV-ICP-OES) employed for analysis.
Utilization of chlorodifluoromethane as a halogenating agent to enhance sample volatilization.
Achieved preconcentration factor of 100 and reduced limits of detection within the 1–100 ng L−1 range.
Simultaneous quantification of 27 elements, including various rare earth, precious, heavy, and transition metals.
method validation demonstrated through spike-recovery assays.

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Demonstrates effective preconcentration of rare earth elements in aqueous solutions, suggesting improved analysis methods.

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Medvedev et al. (2026) studied this question.

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