Label-free detection of microcystin-LR in waters using real- Time potentiometric biosensors based on single-walled carbon nanotubes imprinted polymers

Raquel B. Queirós, João Paulo Noronha, Paulo V. S. Marques, Maria Goreti Ferreira Sales

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)
25 Downloads (Pure)

Abstract

Microcystin-LR (MC-LR) is a dangerous toxin found in environmental waters, quantified by high performance liquid chromatography and/or enzyme-linked immunosorbent assays. Quick, low cost and on-site analysis is thus required to ensure human safety and wide screening programs. This work proposes label-free potentiometric sensors made of solid-contact electrodes coated with a surface imprinted polymer on the surface of Multi-Walled Carbon NanoTubes (CNTs) incorporated in a polyvinyl chloride membrane. The imprinting effect was checked by using non-imprinted materials. The MC-LR sensitive sensors were evaluated, characterized and applied successfully in spiked environmental waters. The presented method offered the advantages of low cost, portability, easy operation and suitability for adaptation to flow methods.

Original languageEnglish
Pages (from-to)758-761
Number of pages4
JournalProcedia Engineering
Volume47
DOIs
Publication statusPublished - 2012
Event26th European Conference on Solid-State Transducers, EUROSENSOR 2012 - Krakow, Poland
Duration: 9 Sept 201212 Sept 2012

Keywords

  • Biosensors
  • CNTs
  • MC-LR
  • Potenciometric

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