Calibrationless pH sensors based on nitrosophenyl and ferrocenyl co-modified screen printed electrodes
Calibrationless pH sensors based on nitrosophenyl and ferrocenyl co-modified screen printed electrodes
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DOI：
10.1016/j.snb.2011.06.082
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发表时间：
2011-11
影响因子：
8.4
通讯作者：
Linhongjia Xiong;Christopher Batchelor‐McAuley;R. Compton
中科院分区：
文献类型：
--
作者：
Linhongjia Xiong;Christopher Batchelor‐McAuley;R. Compton
证明了表面限定的亚硝基苯基的pH传感能力。用循环伏安法和方波伏安法分别对硝基苯基修饰的边平面热解电极（EPPG）和丝网印刷电极（SPE）进行了表征。在25°C下获得59 mV/pH的近能斯特响应。将pH不敏感的内标二茂铁基共修饰到亚硝基苯修饰的丝网印刷电极上。利用pH依赖性亚硝苯基和pH不敏感的二茂铁基的氧化还原电位差实现了无校准pH测量。
The pH sensing capability of surface confined nitrosophenyl groups is demonstrated. Nitrosophenyl modified edge plane pyrolytic electrodes (EPPGs) and screen printed electrodes (SPEs) were characterised by cyclic voltammetry and square wave voltammetry respectively. A near-Nernstian response of 59mV/pH at 25°C, was obtained. A pH insensitive internal reference, ferrocenyl group was co-modified onto the nitrosophenyl modified screen printed electrodes. Calibrationless pH measurement was realised using the difference in the redox potentials of the pH dependent nitrosophenyl and pH insensitive ferrocenyl groups.