基于耗尽型离子选择性纳米球的pH无关纳米光极传感器。
pH independent nano-optode sensors based on exhaustive ion-selective nanospheres.
作者信息
Xie Xiaojiang, Zhai Jingying, Bakker Eric
机构信息
Department of Inorganic and Analytical Chemistry, University of Geneva , Quai Ernest-Ansermet 30, CH-1211 Geneva, Switzerland.
出版信息
Anal Chem. 2014 Mar 18;86(6):2853-6. doi: 10.1021/ac403996s. Epub 2014 Mar 5.
Bulk optode-based ion selective optical sensors work on the basis of extraction equilibria, and their response toward the analyte ion is known to dependent on the sample pH. This pH dependence has been one of the major disadvantages that have hampered the broad acceptance of bulk optodes in chemical sensing. We present here for the first time the use of exhaustive Ca(2+)-selective nanosensors that may overcome this pH dependent response. The nanosensors were characterized at different pH and the same linear calibration was obtained in the Ca(2+) concentration range from 10(-7) M to 10(-5) M.
基于整体光极的离子选择性光学传感器基于萃取平衡工作，并且已知它们对分析物离子的响应取决于样品的pH值。这种对pH值的依赖性一直是阻碍整体光极在化学传感中广泛应用的主要缺点之一。我们首次在此展示了使用可能克服这种pH依赖性响应的耗尽型钙（Ca(2+)）选择性纳米传感器。在不同pH值下对纳米传感器进行了表征，并且在10(-7) M至10(-5) M的钙（Ca(2+)）浓度范围内获得了相同的线性校准。
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