NDLI: Ionic Liquid-Magnetic Nanoparticle Microextraction of Safranin T in Food Samples

Content Provider	Springer Nature Link
Author	Zhang, Lizhen Wu, Hao Liu, Zhenzhen Gao, Nannan Du, Liming Fu, Yunlong
Copyright Year	2014
Abstract	A new two-step microextraction approach combining ionic liquid-dispersive liquid–liquid microextraction with magnetic-dispersive microsolid-phase extraction was developed for the fluorescence determination of safranin T in food samples. In the first step, ionic liquid (1-hexyl-3-methylimidazolium hexafluorophosphate (C$_{6}$MIM][PF$_{6}$)) was used to extract safranin T from a sample solution with the assistance of controlled temperature conditions. Fe$_{3}$O$_{4}$@SiO$_{2}$ magnetic nanoparticles were then used to retrieve the ionic liquid, which were collected by application of an external magnetic field. The ionic liquid and safranin T were recovered from the surface of magnetic nanoparticles using ultrasound and an organic solvent. The effective factors in the proposed method, including type and volume of extraction solvent, pH, dispersive temperature and extraction time, type of desorption solvent, amount of Fe$_{3}$O$_{4}$@SiO$_{2}$ magnetic nanoparticles, and ultrasound time were optimized. Under the optimal conditions (extraction solvent, 100 μL of [C$_{6}$MIM][PF$_{6}$]; pH 9.0; dispersive temperature, 80 °C; extraction time, 5 min; desorption solvent, acetone; amount of Fe$_{3}$O$_{4}$@SiO$_{2}$ magnetic nanoparticles, 5 mg; ultrasound time, 120 s), the method presented has good linearity (r $^{2}$ = 0.9994) in the range of 5–300 ng mL$^{−1}$. The detection limit was 0.48 ng mL$^{−1}$, while the relative standard deviation for the analysis of 100 ng mL$^{−1}$ of the safranin T was 1.47 % (n = 10). The method was successfully applied to the determination of safranin T in tomatoes, tomato sauce, and yuba samples, and good recovery rates (96.71–98.26 %) with relative standard deviation of below 2 % were achieved.
Starting Page	541
Ending Page	548
Page Count	8
File Format	PDF
ISSN	19369751
Journal	Food Analytical Methods
Volume Number	8
Issue Number	3
e-ISSN	1936976X
Language	English
Publisher	Springer US
Publisher Date	2014-07-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ionic liquid-dispersive liquid–liquid microextraction Magnetic-dispersive microsolid-phase extraction Safranin T Fluorescence Food Science Chemistry/Food Science Microbiology Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Safety Research Safety, Risk, Reliability and Quality Applied Microbiology and Biotechnology Food Science

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