Determination of Rhodamine B Pigment in Food Samples by Ionic Liquid Coated Magnetic Core/Shell Fe3O4@SiO2 Nanoparticles Coupled with Fluorescence Spectrophotometry
Science Journal of Chemistry
Volume 5, Issue 1, February 2017, Pages: 1-7
Received: Dec. 18, 2016; Accepted: Jan. 18, 2017; Published: Mar. 6, 2017
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Almojtaba Abd Alkhalig Ahmed Bakheet, Department of Analytical Chemistry, College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, China; Department of Family Sciences, Faculty of Education, University of Khartoum, Khartoum, Sudan
Xia Shi Zhu, Department of Analytical Chemistry, College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, China
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The Ionic liquids (IL) 1-octyl-3-methylimidazole hexafluorophosphate ([OMIM]PF6) was selected from three ILs along with (1-butyl-3-methylimidazole hexafluorophosphate ([BMIM]PF6), 1-hexyl-3-methyl-imidazole hexafluoro-phosphate ([HMIM]PF6), were coated by Fe3O4@SiO2 nanoparticles with core-shell structure to prepare magnetic solid phase extraction agent (Fe3O4@SiO2@IL) and establish a new method of magnetic solid phase extraction (MSPE) coupled with Fluorescence spectrophotometry for separation/analysis of Rhodamine B. The results showed that Rhodamine B was adsorbed rapidly byFe3O4@SiO2@[OMIM]PF6 and eluted by ethanol. Under the optimal conditions the linear range, detection limit (DL), correlation coefficient (R) and relative standard deviation (RSD) were found to be 0.40-140.00 g L-1, 0.06g L-1, 0.9993 and 0.45% (n=3, c=10.00 µg L-1), respectively. The pre-concentration factor of the proposed method was 25-fold. The Fe3O4@SiO2 NPs can be used repeatedly for 10 times. This method has been applied to the determination of Rhodamine B in food samples.
Rhodamine B, IL-magnetic Nanoparticles, Magnetic SPE, Fluorescence Spectrophotometry
To cite this article
Almojtaba Abd Alkhalig Ahmed Bakheet, Xia Shi Zhu, Determination of Rhodamine B Pigment in Food Samples by Ionic Liquid Coated Magnetic Core/Shell Fe3O4@SiO2 Nanoparticles Coupled with Fluorescence Spectrophotometry, Science Journal of Chemistry. Vol. 5, No. 1, 2017, pp. 1-7. doi: 10.11648/j.sjc.20170501.11
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