Abstract
This paper presents a highly sensitive micro sensor for trace determination of lead. The sensor consists of three microelectrodes including a working electrode, a counter electrode, and a reference electrode. On the working electrode surface of the sensor, a bismuth film was evaporated on the working electrode to enhance the sensor's sensitivity and a negatively charged functional film of Nafion for cation-exchanging was deposited to reduce the interference caused by anionic substances in the solution. Compared with traditional glassy carbon electrode based heavy metal sensors, the microfabrication process endows the proposed sensor with great potential in portable heavy metal analyzer industry. Determination of Pb (II) was performed in an acetate buffer solution (0.1 M, pH 4.5) using anodic stripping voltammetry (ASV). Low limit of detection (LOD) of 2.79 ppb is obtained when detecting trace lead with the deposition time of 300 s. This simple, but highly sensitive electrochemical sensor may lead to wide applications of portable monitoring trace metal ions.
Original language | English (US) |
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Title of host publication | TRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 1524-1527 |
Number of pages | 4 |
ISBN (Electronic) | 9781538627310 |
DOIs | |
State | Published - Jul 26 2017 |
Event | 19th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2017 - Kaohsiung, Taiwan, Province of China Duration: Jun 18 2017 → Jun 22 2017 |
Publication series
Name | TRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems |
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Other
Other | 19th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2017 |
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Country/Territory | Taiwan, Province of China |
City | Kaohsiung |
Period | 6/18/17 → 6/22/17 |
Bibliographical note
Publisher Copyright:© 2017 IEEE.
Keywords
- Lead determination
- Nafion
- bismuth film
- micro sensor