Highly sensitive micro sensor with nafion coated bismuth for trace lead determination

Li Wang, Gaoshan Jing, Tianhong Cui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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 languageEnglish (US)
Title of host publicationTRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1524-1527
Number of pages4
ISBN (Electronic)9781538627310
DOIs
StatePublished - Jul 26 2017
Event19th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2017 - Kaohsiung, Taiwan, Province of China
Duration: Jun 18 2017Jun 22 2017

Publication series

NameTRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems

Other

Other19th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2017
CountryTaiwan, Province of China
CityKaohsiung
Period6/18/176/22/17

Keywords

  • Lead determination
  • Nafion
  • bismuth film
  • micro sensor

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    Wang, L., Jing, G., & Cui, T. (2017). Highly sensitive micro sensor with nafion coated bismuth for trace lead determination. In TRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems (pp. 1524-1527). [7994349] (TRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/TRANSDUCERS.2017.7994349