磁性固相萃取-火焰原子吸收光谱法测定工业废水中的Cu2+
FAAS Determination of Cu2+ in Waste Water with Separation by Magnetic Solid Phase Extraction
摘 要
以Fe3O4/多壁碳纳米管/壳聚糖(Fe3O4/MWCNTs/CS)磁性纳米粒子为吸附剂填装于固相萃取柱中,用于分离工业废水中的Cu2+,采用火焰原子吸收光谱法测定Cu2+。当吸附剂用量为30 mg,样品溶液体积为40.0 mL,样品溶液pH 7.0,流量为30 μL·s-1时,用0.5 mol·L-1 HCl以10 μL·s-1的流量进行洗脱,Cu2+的富集倍数达40。Cu2+的线性范围为0.1~30.0 μg·L-1,检出限(3s/k)为0.012 μg·L-1。方法应用于实际样品的分析,加标回收率在98.9%~102%之间,测定值的相对标准偏差(n=3)小于4%。
铜
磁性固相萃取
废水
Flame atomic absorption spectrometry
Copper
Magnetic solid-phase extraction
Waste water
Abstract
Cu2+ in industrial waste water was determined by FAAS after separation by magnetic SPE on a micro-column packed with the magnetic solid adsorbent of Fe3O4/MWCNTs/CS. When 30 mg of the solid adsorbent was used and 40.0 mL of the water sample (at pH 7.0) were passed through the SPE micro-column at a flow-rate of 30 μL·s-1 to adsorb Cu2+, which was then eluted from the micro-column with 0.5 mol·L-1 HCl at a rate of 10 μL·s-1, based on the amount of Cu2+ found by FAAS, a preconcentration factor of 40 was obtained. Linearity range for Cu2+ was found between 0.1-30.0 μg·L-1, with detection limit (3s/k) of 0.012 μg·L-1. The proposed method was applied to the analysis of substantial samples. Test for recovery was made by standard addition method, giving results in the range of 98.9%-102%. RSDs (n=3) were less than 4%.
中图分类号 O657.31 DOI 10.11973/lhjy-hx201601004
所属栏目 试验与研究
基金项目 江苏省卫生厅预防医学科研课题项目(Y2013037); 淮安市科技局科技支撑(社会发展)项目(HAS2013030);淮安市 预防医学会科研课题项目(HAYF201514);江苏省卫生计生委预 防医学科研课题项目(Y2015035)
收稿日期 2015/1/20
修改稿日期
网络出版日期
作者单位点击查看
联系人作者王露(wlnear@163.com)
备注王芹(1982-),女,江苏淮安人,主管检验师,主要 从事卫生检验。
引用该论文: WANG Qin,WANG Yi,WANG Lu,HANG Xue-yu,FENG Xiao-qing,SONG Xin,XU Rui. FAAS Determination of Cu2+ in Waste Water with Separation by Magnetic Solid Phase Extraction[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2016, 52(1): 15～18
王芹,汪怡,王露,杭学宇,冯晓青,宋鑫,徐瑞. 磁性固相萃取-火焰原子吸收光谱法测定工业废水中的Cu2+[J]. 理化检验－化学分册, 2016, 52(1): 15～18
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【3】GAMAGE A, SHAHIDI F. Use of chitosan for the removal of metal ion contaminants and proteins from water［J］. Food Chemistry, 2007,104(3):989-996.
【4】ELWAKEEL K Z. Removal of Cr(Ⅵ) from alkaline aqueous solutions using chemically modified magnetic chitosan resins［J］. Desalination, 2010,250(1):105-112.
【5】KANG Y S, RISBUD S, RABOLT J F, et al. Synthesis and characterization of nanometer-size Fe3O4 and γ-Fe2O3 particles［J］. Chemistry of Materials, 1996,8(9):2209-2211.
【6】VIDAL-VIDAL J, RIVAS J, LPEZ-QUINTELA M A. Synthesis of monodisperse maghemite nanoparticles by the microemulsion method［J］. Colloid and Surfaces A, 2006,288(1/3):44-51.
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【8】HU Xian-luo, YU Jimmy C, GONG Jing-ming. Fast production of self-assembled hierarchical α-Fe2O3 nanoarchitectures［J］. Journal of Physical Chemistry C, 2007,111(30):11180-11185.
【9】BIANCHI F, CHIESI V, CASOLI F, et al. Magnetic solid-phase extraction based on diphenyl functionalization of Fe3O4 magnetic nanoparticles for the determination of polycyclic aromatic hydrocarbons in urine samples［J］. Journal of Chromatography A, 2012,1231(30):8-15.
【10】LIU Jing-fu, ZHAO Zong-shan, JIANG Gui-bin. Coating Fe3O4 magnetic nanoparticles with humic acid for high efficient removal of heavy metals in water［J］. Environmental Science & Technology, 2008,42(18):6949-6954.
【11】ZHU L Z, MA J W, JIAN Q, et al. Chitosan-coated magnetic nanoparticles as carriers of 5-fluorouracil preparation, characterization and cytotoxicity studies［J］. Colloids and Surfaces B: Biointerfaces, 2009,68(1):1-6.
【12】GONG Ji-lai, WANG Bin, ZENG Guang-ming, et al. Removal of cationic-dyes from aqueous solution using magnetic multi-wall carbon nanotube nanocomposite as adsorbent［J］. Journal of Hazardous Materials, 2009,164(2/3):1517-1522.
【13】KONG Li-rong, LU Xiao-feng, ZHANG Wan-jin. Facile synthesis of multifunctional multiwalled carbon nanotubes/Fe3O4 nanoparticles/polyaniline composite nanotubes［J］. Journal of Solid State Chemistry, 2008,181(3):628-636.
【14】WU Chung-hsin. Studies of the equilibrium and thermodynamics of the adsorption of Cu2+ onto as-produced and modified carbon nanotubes［J］. Journal of Colloid and Interface Science, 2007,311(2):338-346.
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