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首页> 外文期刊>International Journal of Electrochemical Science >Copper(II) Trace Determination in Aqueous/Ethanolic Medium Using an Ionic Imprinted Hybrid
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Copper(II) Trace Determination in Aqueous/Ethanolic Medium Using an Ionic Imprinted Hybrid

机译：离子印迹杂化剂测定水/乙醇介质中的痕量铜（II）

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In this work, an ionic imprinted hybrid material organically modified with 3-(2-imidazolin-1-yl)propyltriethoxysilane with copper(II) as template was prepared and structurally characterized, usingelemental analysis, X-ray powder diffraction (XRD), thermogravimetric analysis, infraredspectroscopy and solid state 13C and 29Si nuclear magnetic resonance (NMR). Experiments with cyclicvoltammetry and differential pulse anodic stripping voltammetry (DPASV) showed that the electrodeprepared was stable over 100 cycles, with high reproducibility. Copper(II) ions could be quantified inwater/Brazilian sugar cane spirit (cacha?a). Calibration curve for detection was obtained from 5.98 –201.42 ?g L-1 of copper(II) concentration, with a correlation coefficient of R2 = 0.995; n = 12. Thedetection limit obtained was (LOD) as 0.74 ?g L-1 and the limit of quantification (LOQ) was of 2.48?g L-1 in water/cacha?a. The interference studies in presence of Na(I), Fe(II), Pb(II), Ni(II), and Zn(II)do not significantly affected the peak currents, with high recovery of copper(II) in the range 91.20 % to109.11 % in ethanolic medium and 89.54 % to 116.78% in aqueous medium. The DPASV techniquewas used to determine copper(II) in commercial samples in aqueous/ethanolic medium such as tapwater, cacha?a and ethanol fuel and the results were compared with the values found by flame atomicabsorption spectrometry (FAAS).
机译：在这项工作中，制备了以3-甲基-2-（2-咪唑啉-1-基）丙基三乙氧基硅烷以铜（II）为模板进行有机改性的离子印迹杂化材料，并使用元素分析，X射线粉末衍射（XRD），热重分析法对其结构进行了表征。分析，红外光谱和固态13C和29Si核磁共振（NMR）。循环伏安法和差分脉冲阳极溶出伏安法（DPASV）的实验表明，所制备的电极在100个循环中稳定，重现性高。铜（II）离子可以在水中/巴西甘蔗精（cacha？a）中定量。从5.98 –201.42 µg L-1的铜（II）浓度获得检测的校准曲线，相关系数R2 = 0.995; n =12。在水/茶中的检出限（LOD）为0.74 µg L-1，定量限（LOQ）为2.48 µg L-1。在Na（I），Fe（II），Pb（II），Ni（II）和Zn（II）存在下的干扰研究不会显着影响峰值电流，在此范围内铜（II）的回收率很高在乙醇介质中为91.20％至109.11％，在水性介质中为89.54％至116.78％。 DPASV技术用于测定水/乙醇介质（如自来水，碳酸钙和乙醇燃料）中商业样品中的铜（II），并将结果与​​火焰原子吸收光谱法（FAAS）得出的值进行比较。

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