Magnetic solid phase extraction using ionic liquid-coated core-shell magnetic nanoparticles followed by high-performance liquid chromatography for determination of Rhodamine B in food samples

Food Chemistry
Jieping Chen, Xiashi Zhu

Abstract

Three hydrophobic ionic liquids (ILs) (1-butyl-3-methylimidazole hexafluorophosphate ([BMIM]PF6), 1-hexyl-3-methyl-imidazole hexafluoro-phosphate ([HMIM]PF6), and 1-octyl-3-methylimidazole hexafluorophosphate ([OMIM]PF6)) were used to coat Fe3O4@SiO2 nanoparticles (NPs) with core-shell structures to prepare magnetic solid phase extraction (MSPE) agents (Fe3O4@SiO2@IL). A novel method of MSPE coupled with high-performance liquid chromatography for the separation/analysis of Rhodamine B was then established. The results showed that Rhodamine B was adsorbed rapidly on Fe3O4@SiO2@[OMIM]PF6 and was released using ethanol. Under optimal conditions, the pre-concentration factor for the proposed method was 25. The linear range, limit of detection (LOD), correlation coefficient (R), and relative standard deviation (RSD) were found to be 0.50-150.00 μgL(-1), 0.08 μgL(-1), 0.9999, and 0.51% (n=3, c=10.00 μgL(-1)), respectively. The Fe3O4@SiO2 NPs could be re-used up to 10 times. The method was successfully applied to the determination of Rhodamine B in food samples.

References

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Citations

Aug 31, 2018·Environmental Technology·Yingshi ZhuYanshi Zheng
Apr 30, 2017·Critical Reviews in Analytical Chemistry·Boon Yih HuiHasnah Osman
May 15, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Guo LiHuilan Shi
Aug 28, 2016·Advances in Colloid and Interface Science·Zhiqi He, Paschalis Alexandridis
Aug 2, 2019·International Journal of Biological Macromolecules·Ahmad Reza Bagheri, Mehrorang Ghaedi

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