Citation: XIAO Qing, CHEN Lin, LI Wen-Feng, YANG Li-Qin, CAO Zhong, YU Xin-Yao, LONG Shu, HE Jing-Lin, XIAO Zhong-Liang. A Wireless Sensor Based on 3-Mercaptopropyl Sulfonic Acid Membrane Modified Gold Electrode for Detection of Hg²⁺[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(12): 1886-1894. doi: 10.11895/j.issn.0253-3820.181262 shu

A Wireless Sensor Based on 3-Mercaptopropyl Sulfonic Acid Membrane Modified Gold Electrode for Detection of Hg²⁺

Collaborative Innovation of Micro/nano Bio-Sensing and Food Safety Inspection, Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China

Received Date: 20 April 2018
Revised Date: 8 July 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 31527803, 21275022, 21645009) and the Science and Technology Service-net (STS) Program of the Chinese Academy of Sciences (No. KFJ-SW-STS-173).

A novel wireless sensing device was designed by adopting remote controlling procedure through wireless electronic transmitting/receiving modules for acquiring potential data based on 3-mercaptopropanesulfonic acid (MPS) modified gold electrode, which could be applied to remote ultrasensitive monitoring of Hg²⁺. The surface properties of MPS membrane electrodes with Hg²⁺ combined and uncombined were characterized by means of SEM, XPS, electrochemical impedance spectroscopy and cyclic voltammetry, indicating that the MPS containing the terminal of sulfonic group exhibited good recognition interaction toward Hg²⁺ through electrostatic adsorption, which was due to the formation of double electric layer resulting in change of membrane potential. In Tris-HCl buffer solution (pH=6.0), the MPS membrane electrode had good linear relationship between potential response and Hg²⁺ concentration in the range of 1.0×10^-8-1.0×10^-3 mol/L with a slope of 59.08 mV/(-pC) (25℃), and the detection limit was calculated to be 8.31 nmol/L. In addition, the MPS-based wireless sensor displayed fast response time, i.e. 8 s, with good stability, reproducibility and selectivity. This method was successfully used for the determination of Hg²⁺ in real water samples with recovery of 93.7%-101.9%, showing important application prospects in real-time monitoring of environmental water.
- Mercury,
- 3-Mercaptopropanesulfonic acid,
- Potential response,
- Selective membrane electrode,
- Wireless sensing
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沈阳化工大学材料科学与工程学院沈阳 110142

A Wireless Sensor Based on 3-Mercaptopropyl Sulfonic Acid Membrane Modified Gold Electrode for Detection of Hg2+

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通讯作者: 陈斌, bchen63@163.com

A Wireless Sensor Based on 3-Mercaptopropyl Sulfonic Acid Membrane Modified Gold Electrode for Detection of Hg²⁺