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.com
Volume 7
Biosensors Journal
ISSN: 2090-4967
Electrochemistry 2018
June 11-12, 2018
June 11-12, 2018 | Rome, Italy
4
th
International Conference on
Electrochemistry
New approach of flexible electrodes coated with carbon nanotubes/poly(3,4-ethylenedioxythiophene
(PEDOT) for mancozeb analysis in water
Roy Zamora
1
, Federico Masís Meléndez
2
, Hayden Phillips
1
and
Ricardo Starbird
1
1
Costa Rica Institute of Technology, Costa Rica
2
CEQIATEC - Costa Rica Institute of Technology, Costa Rica
T
he extensive use of pesticides in crops generates a negative environmental impact affecting water quality and organisms.The
intensive use of mancozeb pesticide (MCZ), in developing countries such as Costa Rica can cause severe chronic diseases in
people. Therefore, it is paramount to access the residual amount of this agrochemical in water bodies. The purpose of this work
is to develop a novel and economical electrode to detect mancozeb in water by electrochemical techniques. The electrodes of
poly(3,4-ethylenedioxythiophene) (PEDOT) mixed with CNTs were characterized using thermogravimetric analysis (TGA),
atomic force microscopy (AFM) techniques and its recovery after leaching through a sand column. Cyclic voltammetry was
applied to characterize the electrochemical behavior of MCZ and its quantification in commercial formulations. The PEDOT/
MWCNT electrode provides a robust electrochemical response in the linear range in addition to a faster procedure that can
be conducted with fewer solvents and is more environmentally friendly compared to other techniques used to measure MCZ.
Measures of this signal intensity as a function of concentration were used to quantify MCZ. Linearity yields a value over R>0.99
in the range from 25 to 150 μmol/L. The recovery value obtained for the tap water was 51.2 μmol/L equivalent to 102%. Speed
on signal outputs and the feasible procedure make this new approach a candidate to undertake monitoring programs for
ecological, agricultural and hydrological applications.
Figure 1:
Voltammograms obtained for different mancozeb concentrations in at pH 7 using PCNT electrode. Inset: flexible electrodes and SEM image.
Recent Publications
1. Mora Barrantes J, Zamora Sequeira R, Benavides Ramírez D and Haug T (2014) Tübingen University radioactive material
and waste management. Revista Tecnología en Marcha 27(2):22-31.
2. Starbird R, García González C A, Smirnova I, Krautschneider W H and Bauhofer W (2014) Synthesis of an organic
conductive porous material using starch aerogels as template for chronic invasive electrodes. Materials Science and
Engineering C 37:177-183.
3. Zamora R, Masís Meléndez F, Phillips H, Alvarado Marchena L and Starbird R (2018) Development of poly(3,4-
ethylenedioxythiophene(PEDOT)/carbon nanotube electrodes for electrochemical detection of mancozeb in water. Int.
J. Electrochem. Sci. 13:1931–1944.
4. Zamora R, Ardao I, Starbird R and García González C A (2018) Conductive nanostructured materials based on poly-
(3,4-ethylenedioxythiophene) (PEDOT) and starch/κ-carrageenan for biomedical applications. Carbohydrate Polymers
DOI: 10.1016/j.carbpol.2018.02.040.
Biography
He has experience in polymers, by profession he is an Industrial Chemist, he has a Master's degree in Industrial Engineering, he is currently a PhD student and works at the
Technological University of Costa Rica (TEC), as a Professor at the Materials School and works with the laboratory's chemical regent of polymers of the National Institute
of Learning. His research area focuses on standardization of procedures, validation of methods and conducting and nano-structured polymers.
rzamorasequeira@ina.ac.crRoy Zamora et al., Biosens J 2018, Volume 7
DOI: 10.4172/2090-4967-C1-002