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Updated: Jun 17, 2026

A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture
Published on: September 29, 2023
Silica gel modified with 1-(2-aminoethyl)-3-phenylurea for selective solid-phase extraction and preconcentration of
Zhifeng Tu1, Zheng Hu, Xijun Chang
1Department of Chemistry, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu 730000, PR China.
Abstract:
A new method that utilizes 1-(2-aminoethyl)-3-phenylurea-modified silica gel as a solid-phase extractant has been developed for preconcentration of trace Sc(III) prior to the measurement by inductively coupled plasma atomic emission spectrometry (ICP-AES). Experimental conditions for effective adsorption of trace level of Sc(III) were optimized using batch and column procedures in detail. The optimum pH value for the separation of Sc(III) on the new sorbent was 4 and complete elution of Sc(III) from the sorbent surface was carried out using 1.0mL of 0.1molL(-1) HCl. Common coexisting ions did not interfere with the separation and determination of the analyte. The maximum static adsorption capacity of the sorbent at optimum conditions was found to be 32.5mgg(-1) while the time of 95% adsorption was less than 2min. The detection limit of present method was found to be 0.091microgg(-1), and the relative standard deviation (RSD) was lower than 3.0% (n=8). The method was successfully applied for the preconcentration of trace Sc(III) in the environmental samples with satisfactory results.
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