A carbon aerogel composite templated and catalyzed by ionic liquid was fabricated to obtain a meso-porous and cross-linked structure while avoiding the freeze and supercritical drying. It was then carboxylated to obtain favorable surface groups. The easily prepared material displayed excellent extraction effect of six tetracyclines (TCs) compared to the non-carboxylated carbon aerogel. A direct immersion solid-phase microextraction method to determine six TCs in aqueous samples was developed coupling with high-performance liquid chromatography (HPLC) with UV-Vis detector set at 355 nm. The experimental parameters affecting the analytical performance of this method, including sample pH, ionic strength, extraction and desorption time, extraction volume, and temperature, were optimized. Adsorption kinetics and thermodynamics models were used to clarify the extraction mechanism. Under the optimized conditions, this method has a wide linear range of 2–1000 μg L−1, low limits of detection of 0.36–0.71 μg L−1, repeatability of 1.85–10.96%, and reproducibility of 4.92–13.47% for six TCs. The method was successfully applied to detect TC residues in egg and poultry farm wastewater samples.
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Anhui Provincial Natural Science Foundation (No. 1908085 MB 52) supported this work.
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Dong, ZM., Cheng, L., Sun, T. et al. Carboxylation modified meso-porous carbon aerogel templated by ionic liquid for solid-phase microextraction of trace tetracyclines residues using HPLC with UV detection. Microchim Acta 188, 43 (2021). https://doi.org/10.1007/s00604-021-04707-2
- Carboxylic carbon aerogel
- Ionic liquid
- Solid-phase microextraction