Selective Solid-Phase Extraction and Trace Monitoring of Lead Ions in Food and Water Samples Using New Lead-Imprinted Polymer Nanoparticles
Selective Solid-Phase Extraction and Trace Monitoring of Lead Ions in Food and Water Samples Using New Lead-Imprinted Polymer Nanoparticles
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DOI：
10.1007/s12161-014-9924-5
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发表时间：
2015-03-01
影响因子：
2.9
通讯作者：
Zadeh, Salman Hassan
中科院分区：
文献类型：
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作者：
Behbahani, Mohammad;Hassanlou, Parmoon Ghareh;Zadeh, Salman Hassan
建立了Pb 2+离子印迹聚合物（Pb 2 +-IIP）纳米粒子固相萃取-火焰原子吸收光谱法（FAAS）预富集和痕量检测环境样品中铅离子的方法。以4-乙烯基吡啶（功能单体）、乙二醇二甲基丙烯酸酯（交联剂）、2，2 '-偶氮二异丁腈（引发剂）、4-（2-吡啶偶氮）间苯二酚（铅结合配体）和铅离子（模板离子）为原料，在乙腈溶液中通过沉淀聚合法制备了Pb 2 +-IIP纳米粒子。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、热重/差热分析（TGA/DTA）和扫描电子显微镜（SEM）对Pb 2 +-IIP纳米粒子进行了表征。考察了影响固相萃取过程吸附和解吸的各种因素，并进行了优化。在优化的条件下，该方法的检出限为0.9 μ g L-1，而5次重复测量的相对标准偏差（RSD）计算为<4%。为了证明所提出的方法是可靠的，使用了一系列具有不同和复杂基质的食品和水样品。
A solid-phase extraction method using Pb2+ ion-imprinted polymer (Pb2+-IIP) nanoparticles combined with flame atomic absorption spectrophotometry (FAAS) was developed for the preconcentration and trace monitoring of lead ions in environmental samples. The Pb2+-IIP nanoparticles were obtained by precipitation polymerization of 4-vinylpyridine (the functional monomer), ethylene glycol dimethacrylate (the cross-linker), 2,2'-azobisisobutyronitrile (the initiator), 4-(2-pyridylazo) resorcinol (the lead-binding ligand), and lead ions (the template ion) in acetonitrile solution. The Pb2+-IIP nanoparticles were characterized by Fourier transformed infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TGA/DTA), and by scanning electron microscopy (SEM). Different affecting parameters on the adsorption and desorption of this solid-phase extraction process were evaluated and optimized. Under the optimized conditions, the detection limit for the proposed method was found to be 0.9 mu g L-1, while the relative standard deviation (RSD) for five replicate measurements was calculated to be < 4 %. For proving that the proposed method is reliable, a range of food and water samples with different and complex matrices was used.