TY - JOUR
T1 - Flexible carbon electrodes for electrochemical detection of bisphenol-a, hydroquinone and catechol in water samples
AU - de Sá, Acelino C.
AU - Barbosa, Simone C.
AU - Raymundo-Pereira, Paulo A.
AU - Wilson, Deivy
AU - Shimizu, Flávio M.
AU - Raposo, Maria
AU - Oliveira, Osvaldo N.
N1 - This research was funded by Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), grant number (Proc. 2018/22214-6 and 2016/01919-6); by Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brazil (CAPES), grant number 88887.375050/2019-00 and 88887.375049/2019-00; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico-CNPq, grant number 153855/2018-5 and 423952/2018-8 and INEO (Brazil).
PY - 2020/12/17
Y1 - 2020/12/17
N2 - The detection of pollutant traces in the public water supply and aquifers is essential for the safety of the population. In this article, we demonstrate that a simple electrochemical procedure in acidic solution can be employed for enhancing the sensitivity of flexible screen-printed carbon electrodes (SPEs) to detect bisphenol-A (BPA), hydroquinone, and catechol, simultaneously. The SPEs were pretreated electrochemically in a H2 SO4 solution, which did not affect their morphology, yielding high current signals with well separated oxidation peaks. The sensitivity values were 0.28, 0.230, and 0.056 µA L µmol−1 with detection limits of 0.12, 0.82, and 0.95 µmol L−1 for hydroquinone, catechol, and BPA, respectively. The sensors were reproducible and selective for detecting BPA in plastic cups, and with adequate specificity not to be affected by interferents from water samples. The simple, inexpensive, and flexible SPE may thus be used to detect emerging pollutants and monitor the water quality.
AB - The detection of pollutant traces in the public water supply and aquifers is essential for the safety of the population. In this article, we demonstrate that a simple electrochemical procedure in acidic solution can be employed for enhancing the sensitivity of flexible screen-printed carbon electrodes (SPEs) to detect bisphenol-A (BPA), hydroquinone, and catechol, simultaneously. The SPEs were pretreated electrochemically in a H2 SO4 solution, which did not affect their morphology, yielding high current signals with well separated oxidation peaks. The sensitivity values were 0.28, 0.230, and 0.056 µA L µmol−1 with detection limits of 0.12, 0.82, and 0.95 µmol L−1 for hydroquinone, catechol, and BPA, respectively. The sensors were reproducible and selective for detecting BPA in plastic cups, and with adequate specificity not to be affected by interferents from water samples. The simple, inexpensive, and flexible SPE may thus be used to detect emerging pollutants and monitor the water quality.
KW - Bisphenol-A
KW - Electrochemical sensor
KW - Emerging pollutants
KW - Flexible carbon electrodes
KW - Hydroquinone and catechol
KW - Water samples
UR - http://www.scopus.com/inward/record.url?scp=85093700956&partnerID=8YFLogxK
U2 - 10.3390/chemosensors8040103
DO - 10.3390/chemosensors8040103
M3 - Article
AN - SCOPUS:85093700956
SN - 2227-9040
VL - 8
SP - 1
EP - 11
JO - Chemosensors
JF - Chemosensors
IS - 4
M1 - 103
ER -
