Solid-phase extraction of mercury(II) with magnetic core-shell nanoparticles, followed by its determination with a rhodamine-based fluorescent probe期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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**Figure**
Functional magnetic Fe₃O₄@SiO₂ core shell nanoparticles were utilized for solid phase extraction of Hg(II) from aqueous solutions, and the extracted Hg(II) was determined by a rhodamine-based fluorescent probe RP with satisfying results.
Solid-phase extraction of mercury(II) with magnetic core-shell nanoparticles, followed by its determination with a rhodamine-based fluorescent probe

Authors:	Feng Pan Jie Mao Qiang Chen Pengbo Wang

Institution:	1. College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, People’s Republic of China 2. Department of Chemistry, Anhui Science and Technology University, Bengbu, Anhui, 233100, People’s Republic of China

Abstract:	Magnetic Fe₃O₄@SiO₂ core shell nanoparticles containing diphenylcarbazide in the shell were utilized for solid phase extraction of Hg(II) from aqueous solutions. The Hg(II) loaded nanoparticles were then separated by applying an external magnetic field. Adsorbed Hg(II) was desorbed and its concentration determined with a rhodamine-based fluorescent probe. The calibration graph for Hg(II) is linear in the 60 nM to 7.0 μM concentration range, and the detection limit is at 23 nM. The method was applied, with satisfying results, to the determination of Hg(II) in industrial waste water.

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