Electrochemical sensor for detecting lead as well as preparation method and application thereof
An electrochemical and sensor technology, applied in the field of electrochemical sensors for detecting lead and its preparation, can solve the problems of unstable fixation, affecting DNA activity, and easy use of environmentally harmful substances, so as to improve sensitivity, improve detection performance, and improve The effect of sensitivity
Inactive Publication Date: 2014-09-03
HUNAN UNIV
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The invention relates to an electrochemical sensor for detecting lead. The electrochemical sensor comprises a glassy carbon electrode, wherein the glassy carbon electrode is utilized as a working electrode in a tri-electrode system, the surface of a detection end of the glassy cabon electrode is modified by a multi-walled carbon nanotube, nano golden particles are deposited on the multi-walled carbon nanotube, and a sulfydryl-modified capturing probe is connected with the nano golden particles; the electrochemical sensor further comprises an aptamer probe, wherein the aptamer probe and the sulfydryl-modified capturing probe are complementally paired to form a double-chain structure. According to the electrochemical sensor for detecting the lead, the aptamer probe is utilized to cover lead ions so as to be separated from the capturing probe, and during the separation, an electrochemical signal to be detected is generated, so that the purpose of detecting the content of the lead ions in the water body is achieved; the electrochemical sensor has the advantages of high sensitivity, excellent selectivity and stability, and the like.
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Property | Measurement | Unit |
Concentration | 0.1 ~ 0.5 | mM |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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