1. Selenium Speciation in Rice Samples by Magnetic Ionic Liquid-Based Up-and-Down-Shaker-Assisted Dispersive Liquid-Liquid Microextraction Coupled to Graphite Furnace Atomic Absorption Spectrometry
- Author
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Guoliang Xu, Guozhen Wang, Xiaojun Wang, Liang Cao, Siyu Yang, Ye Fang, Peng Chen, and Xincheng Hong
- Subjects
Detection limit ,Magnetic ionic liquid ,Aqueous solution ,Chromatography ,Chemistry ,010401 analytical chemistry ,Analytical chemistry ,chemistry.chemical_element ,02 engineering and technology ,Repeatability ,021001 nanoscience & nanotechnology ,Mass spectrometry ,01 natural sciences ,Applied Microbiology and Biotechnology ,0104 chemical sciences ,Analytical Chemistry ,Agitator ,0210 nano-technology ,Safety, Risk, Reliability and Quality ,Graphite furnace atomic absorption ,Safety Research ,Selenium ,Food Science - Abstract
A novel and sensitive magnetic ionic liquid-based up-and-down-shaker-assisted dispersive liquid-liquid microextraction (MIL-UDSA-DLLME) was developed for the graphite furnace atomic absorption spectrometric measurement of inorganic selenium speciation from various rice matrixes. In the first microextraction step, the magnetic ionic liquid (1-butyl-3-methylimidazolium tetrachloroferrate, [C4mim][FeCl4]) was selected to extract the complex of Se(IV) and 2,3-diaminonaphthalene from aqueous solution by the assistance of up-and-down-shaker vortex agitator. After the microextraction step, the magnetic ionic liquid containing target analytes was collected at the bottom of the tube by applying an external magnetic field around the test tube. Under the optimized conditions, the method present has low detection limit (0.018 μg L−1), wide linear dynamic range (0.03–10 μg L−1), and good repeatability (
- Published
- 2016