Ultrasensitive determination of inorganic arsenic by hydride generation-atomic fluorescence spectrometry using Fe3O4@ZIF-8 nanoparticles for preconcentration

被引：58
作者：
Zou, Zhirong [1 ]
Wang, Shanling [1 ]
Jia, Jia [1 ]
Xu, Fujian [2 ]
Long, Zhou [1 ]
Hou, Xiandeng [1 ,2 ]
机构：
[1] Sichuan Univ, Analyt & Testing Ctr, Chengdu 610064, Sichuan, Peoples R China
[2] Sichuan Univ, Coll Chem, Chengdu 610064, Sichuan, Peoples R China
来源：
MICROCHEMICAL JOURNAL | 2016年 / 124卷
关键词：
Fe3O4@ZIF-8; Arsenic; Pre-concentration; Hydride generation (HG); Atomic fluorescence spectrometer (AFS); METAL-ORGANIC FRAMEWORKS; ZEOLITIC IMIDAZOLATE FRAMEWORK-8; PHOTOCHEMICAL VAPOR GENERATION; AQUEOUS-SOLUTION; REMOVAL; WATER; TOXICITY; SPECIATION; SORBENT; IONS;
D O I：
10.1016/j.microc.2015.10.005
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work, magnetic Fe3O4@ZIF-8 core-shell nanoparticles (MNPs) were employed for effective adsorption of inorganic arsenic for preconcentration, with adsorption mechanism thoroughly discussed. The adsorbed inorganic arsenic was easily separated by a magnet along with the MNPs from the sample matrix, with possible matrix interference eliminated. The MNPs were then completely dissolved in hydrochloric acid prior to the determination of inorganic arsenic by hydride generation-atomic fluorescence spectrometry. The Fe3O4@ZIF-8 MNPs were prepared with a facile step-by-step assembly method in aqueous solution at room temperature. Under the optimized conditions, the sensitivity for inorganic arsenic determination was significantly increased through preconcentration, with satisfactory analytical merits obtained. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：578 / 583
页数：6
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