首页> 外文期刊>International journal of environmental analytical chemistry >Solid phase extraction and determination of metal ions in aqueous samples using Quercetin modified Amberlite XAD-16 chelating polymer as metal extractant
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Solid phase extraction and determination of metal ions in aqueous samples using Quercetin modified Amberlite XAD-16 chelating polymer as metal extractant

机译:槲皮素修饰的Amberlite XAD-16螯合聚合物作为金属萃取剂固相萃取和测定水溶液中的金属离子

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摘要

A new chelating polymer has been developed using Amberlite XAD-16 anchored with Quercetin. The modified polymer was characterised by Fourier Transform Infra Red (FTIR) spectroscopy, thermogravimetric analysis, surface area analysis and elemental analysis. The Quercetin anchored polymer showed superior binding affinity for Cr(III), Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) with greater than 95% adsorption under optimum conditions. The optimum pH conditions for the quantitative sorption of metal ions were studied. The developed method showed superior extraction qualities with high metal loading capacities of 387, 313, 195, 473, 210 and 320 μmol g~(-1) for Cu(II), Co(II), Cr(III), Fe(III), Mn(II) and Ni(II), respectively. The rate of metal ion uptake i.e. kinetics studies performed under optimum levels, showed t_(1/2) for Co(II), Cu(II), Cr(III), Fe(III), Mn(II) and Ni(II) is 20, 15, 25, 10, 30 and 15 min, respectively. Desorption of metal ions was effective with 10 mL of 2M HCl prior to analysis using flame atomic absorption spectrophotometer. The chelating polymer was highly ion selective in nature even in the presence of interferent ions, with a high preconcentrating ability for the metal ions of interest. The developed chelating polymer was tested on its utility with synthetic and real samples like river, tap water samples and also with multivitamin tablets. It showed relative standard deviation (R.S.D.) values of/less than 3.0% reflecting on the accuracy and reproducibility of data using the newly developed chelating polymer.
机译:已经使用锚定槲皮素的Amberlite XAD-16开发了一种新的螯合聚合物。通过傅立叶变换红外光谱(FTIR),热重分析,表面积分析和元素分析对改性聚合物进行表征。槲皮素锚定的聚合物在最佳条件下对Cr(III),Mn(II),Fe(III),Co(II),Ni(II)和Cu(II)表现出优异的结合亲和力。研究了用于定量吸附金属离子的最佳pH条件。所开发的方法显示出优异的提取质量,对Cu(II),Co(II),Cr(III),Fe(III)的高金属负载量分别为387、313、195、473、210和320μmolg〜(-1)g〜(-1) ),Mn(II)和Ni(II)。金属离子的吸收速率,即在最佳水平下进行的动力学研究,表明Co(II),Cu(II),Cr(III),Fe(III),Mn(II)和Ni(II )分别是20、15、25、10、30和15分钟。在使用火焰原子吸收分光光度计进行分析之前,用10 mL 2M HCl可以有效地解吸金属离子。该螯合聚合物本质上即使在存在干扰离子的情况下也是高度离子选择性的,并且对目标金属离子具有很高的预浓缩能力。所开发的螯合聚合物已在合成和真实样品(如河水,自来水样品以及多种维生素片剂)上进行了实用性测试。它显示相对标准偏差(R.S.D.)值小于/小于3.0%,反映了使用新开发的螯合聚合物的数据的准确性和可重复性。

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