Detection of heavy metal ions in contaminated water by surface plasmon resonance based optical fibre sensor using conducting polymer and chitosan
Detection of heavy metal ions in contaminated water by surface plasmon resonance based optical fibre sensor using conducting polymer and chitosan
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DOI：
10.1016/j.foodchem.2014.06.045
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发表时间：
2015-01-01
期刊：
影响因子：
8.8
通讯作者：
Gupta, Banshi D.
中科院分区：
文献类型：
--
作者：
Verma, Roli;Gupta, Banshi D.
设计了一种基于光纤表面等离子体共振（SPR）的饮用水中重金属离子检测传感器。采用银（Ag）和氧化铟锡（ITO）作为SPR探针材料，并在表面修饰吡咯和壳聚糖复合物。该传感器采用波长解调技术，能够检测污染水中痕量的Cd 2+、Pb 2+和Hg 2+重金属离子。制备了四种类型的重金属离子传感探针，并对这些探针进行了表征，发现吡咯/壳聚糖/ITO/Ag涂层探针在所有其他探针中具有高度的灵敏度。此外，镉离子比其他离子更强地结合到感测表面，并且由于这一点，传感器对Cd 2+离子高度敏感。该传感器对低浓度的重金属离子的性能最好，其灵敏度随着重金属离子浓度的增加而降低。(C)2014爱思唯尔有限公司版权所有。
Optical fibre surface plasmon resonance (SPR) based sensor for the detection of heavy metal ions in the drinking water is designed. Silver (Ag) metal and indium tin oxide (ITO) are used for the fabrication of the SPR probe which is further modified with the coating of pyrrole and chitosan composite. The sensor works on the wavelength interrogation technique and is capable of detecting trace amounts of Cd2+, Pb2+, and Hg2+ heavy metal ions in contaminated water. Four types of sensing probes are fabricated and characterised for heavy metal ions out of these pyrrole/chitosan/ITO/Ag coated probe is found to be highly sensitive among all other probes. Further, the cadmium ions bind strongly to the sensing surface than other ions and due to this the sensor is highly sensitive for Cd2+ ions. The sensor's performance is best for the low concentrations of heavy metal ions and its sensitivity decreases with the increasing concentration of heavy metal ions. (C) 2014 Elsevier Ltd. All rights reserved.