Preconcentration and Determination of Cadmium, Lead, and Cobalt in Moringa Oleifera (Moringaceae) Using Magnetic Solid-Phase Extraction and Flame Atomic Absorption Spectrometry

被引：31
|
作者：
Ju, Shuangqiao [1 ]
Liu, Mousheng [1 ]
Yang, Yaling [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Life Sci & Technol, Kunming 650500, Yunnan, Peoples R China
来源：
ANALYTICAL LETTERS | 2016年 / 49卷 / 04期
关键词：
Fe3O4; nanoparticles; flame atomic absorption spectrometry; heavy metals; magnetic solid-phase extraction; oleic acid; MULTIWALLED CARBON NANOTUBES; LIQUID-LIQUID MICROEXTRACTION; FE3O4; NANOPARTICLES; WATER SAMPLES; OLEIC-ACID; FLUORESCENCE SPECTROMETRY; ENVIRONMENTAL-SAMPLES; HEXAVALENT CHROMIUM; ALPHA-TOCOPHEROL; VAPOR GENERATION;
D O I：
10.1080/00032719.2015.1076831
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Magnetic solid-phase extraction was used for the preconcentration of cadmium, lead, and cobalt in Moringa Oleifera with determination by flame atomic absorption spectrometry. Fe3O4 nanoparticles were modified by oleic acid to form the sorbent for magnetic solid-phase extraction. The modified sorbent was characterized by transmission electron microscopy, infrared spectroscopy, and X-ray diffraction. The preconcentration was optimized for the mass of nanoparticles, pH, adsorption time, the presence of coexisting ions, solution volume, eluent, and reuse. The optimized limits of detection were 0.09, 0.26, and 0.54 mu g/L for Cd(II), Pb(II), and Co(II) with relative standard deviations below 4.3%. The method was employed for the analysis of Moringa oleifera and recoveries between 90.0 and 102.0% were obtained.
引用
收藏
页码：511 / 522
页数：12
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