Amperometric detection of triclosan with screen-printed carbon nanotube electrodes modified with Guinea Grass (Panicum maximum) peroxidase
Triclosan is a compound with antimicrobial activity broadly used in consumer products. Because of its well-documented toxicity, the amount of triclosan present in different products needs to be tightly controlled. This paper outlines a new amperometric sensor for triclosan detection consisting of...
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| Formato: | article |
| Lenguaje: | EN ES |
| Publicado: |
Pontificia Universidad Javeriana
2019
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/10ced643cb074d758f142f36094c2d3c |
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| Sumario: | Triclosan is a compound with antimicrobial activity broadly used in consumer
products. Because of its well-documented toxicity, the amount of triclosan
present in different products needs to be tightly controlled. This paper
outlines a new amperometric sensor for triclosan detection consisting of a
screen-printed carbon nanotube electrode (SPCNE) modified with Guinea
grass peroxidase (GGP). The GGP-modified SPCNE was able to detect an
enhanced electrochemical response of triclosan, unlike the bare SPCNE. The
cyclic voltammograms of the GGP-modified SPCNE in a solution of potassium
ferrocyanide showed an increase in the current values and linearity between
scan rates and oxidation peak currents, suggesting a surface-controlled process.
The GGP-modified SPCNE showed an excellent electrocatalytic activity to
triclosan oxidation, at a redox potential of 370 mV, in the presence of hydrogen
peroxide, exhibiting a linear response between 20 mM to 80 mM and a detection
limit of 3 µM. This new amperometry system, based on carbon nanotubes
integrated with GGP, becomes a potential tool for environmental analysis and
food quality control. |
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