Design of a novel optical sensor for determination of trace gadolinium
Design of a novel optical sensor for determination of trace gadolinium
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DOI：
10.1016/j.jhazmat.2009.06.044
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发表时间：
2009-11-15
影响因子：
13.6
通讯作者：
Ganjali, M. R.
中科院分区：
文献类型：
--
作者：
Zare-Dorabei, R.;Norouzi, P.;Ganjali, M. R.
在这项工作中，一个高选择性和灵敏度的钆（Gd）的光学传感器的基础上固定的双（噻吩）吡啶-2，6-二胺（BPD），在三乙酰纤维素膜已被报道。该光电管显示Gd（III）离子浓度的线性范围为2.5 × 10（-6）M，检测限为0.93 × 10（-8）M。新设计的光电管的响应时间在1-2分钟内，取决于Gd（III）离子的浓度。传感器的响应在2.0-9.0的范围内与溶液pH无关。它体现了以下优点：低检测限、快速响应时间，以及最重要的是，对许多镧系元素离子（La、Ce、Sm、Tm、Ho和Eu离子）具有非常好的选择性。该传感器成功地用硫脲溶液再生，其响应是可逆的和可重复的（R.S.D.）。低于1.4%）。该光电二极管用于合成样品和水样中Gd（III）的测定，并与标准物质（CRM）进行了验证。(C)2009 Elsevier B. V.保留所有权利。
In this work, a highly selective and sensitive gadolinium (Gd) optical sensor based on immobilization of bis(thiophenal) pyridine-2,6-diamine (BPD), on a triacetylcellulose membrane has been reported. This optode exhibits a linear range of the Gd(III) ion concentration of 2.5 x 10(-6) M with a detection limit of 0.93 x 10(-8) M. Response time of the newly designed optode was within 1-2 min, depending on the Gd(III) ion concentration. Response of the sensor is independent of solution pH in the range of 2.0-9.0. it manifests advantages of: low detection limit, fast response time, and most significantly, very good selectivity with respect to a number of lanthanide ions (La, Ce, Sm, Tm, Ho, and Eu ions). The sensor was successfully regenerated with thiourea solutions and its response was reversible and reproducible (R.S.D. less than 1.4%). This optode was applied to determine Gd(III) in synthetic and water samples, and validated with certified reference materials (CRMs). (C) 2009 Elsevier B.V. All rights reserved.