Abstract
Sub-2-µm sea-urchin-like TiO2 microspheres were prepared through the one-step solvothermal method. Results of scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that there are a lot of nanorods coming out from the center of the TiO2 microsphere, making it look like a sea urchin. The morphology and structure of these microspheres are very suitable for chromatographic packing. During the separation of inorganic anions on this new stationary phase, the retention mechanism is electrostatic interaction, and the pH of the mobile phase plays an important role in retention behaviors. With this new stationary phase for separation of organic anions and nucleobases, Lewis acid–base interaction is more outstanding, which can cause peak broadening and tail for larger conjugated structure compounds. The separation of aromatic hydrocarbons on this new stationary phase demonstrates that Lewis acid–base interaction has a favorable influence on the separation of electron-rich aromatic hydrocarbons under normal phase chromatographic conditions.
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Abbreviations
- HPLC:
-
High-performance liquid chromatography
- SEM:
-
Scanning electron microscope
- TEM:
-
Transmission electron microscopy
- XRD:
-
X-ray diffractometer
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Acknowledgements
Financial supports from the Youth Innovation Promotion Association of the Chinese Academy of Sciences (No. 2015344), the CAS “Light of West China” Program, the Health research fund of Gansu Province (GSWSKY-2014-06), and the Inner Fund of Gansu Provincial Hospital (16GSSY5-1) are gratefully acknowledged.
Funding
This study was funded by the Youth Innovation Promotion Association of the Chinese Academy of Sciences (No. 2015344), the CAS “Light of West China” Program, the Health research fund of Gansu Province (GSWSKY-2014-06), and the Inner Fund of Gansu Provincial Hospital (16GSSY5-1).
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Mei, L., Tang, H., Wang, S. et al. One-Step Solvothermal Synthesis of Sub-2-µm Sea Urchin-Like TiO2 Microspheres for High-Performance Liquid Chromatography Stationary Phase. Chromatographia 85, 365–371 (2022). https://doi.org/10.1007/s10337-022-04140-4
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DOI: https://doi.org/10.1007/s10337-022-04140-4