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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

lexible and integrated dual carbon sensor for multiplexed detection of nonylphenol and paroxetine in tap water sample

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Author(s):
Gomes, Nathalia O. [1] ; Mendonca, Camila D. [1] ; Machado, Sergio A. S. [1] ; Oliveira, Jr., Osvaldo N. [2] ; Raymundo-Pereira, Paulo A. [2]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13566590 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Microchimica Acta; v. 188, n. 10 OCT 2021.
Web of Science Citations: 0
Abstract

Multiplex detection of emerging pollutants is essential to improve quality control of water treatment plants, which requires portable systems capable of real-time monitoring. In this paper we describe a flexible, dual electrochemical sensing device that detects nonylphenol and paroxetine in tap water samples. The platform contains two voltammetric sensors, with different working electrodes that were either pretreated or functionalized. Each working electrode was judiciously tailored to cover the concentration range of interest for nonylphenol and paroxetine, and square wave voltammetry was used for detection. An electrochemical pretreatment with sulfuric acid on the printed electrode enabled a selective detection of nonylphenol in 1.0-10 x 10(-6) mol L-1 range with a limit of detection of 8.0 x 10(-7) mol L-1. Paroxetine was detected in the same range with a limit of detection of 6.7 x 10(-7) mol L-1 using the printed electrode coated with a layer of carbon spherical shells. Simultaneous detection of the two analytes was achieved in tap water samples within 1 min, with no fouling and no interference effects. The long-term monitoring capability of the dual sensor was demonstrated in phosphate buffer for 45 days. This performance is statistically equivalent to that of high-performance liquid chromatography (HPLC) for water analysis. The dual-sensor platform is generic and may be extended to other water pollutants and clinical biomarkers in real-time monitoring of the environment and health conditions. (AU)

FAPESP's process: 19/01777-5 - Manufacture of disposable electrochemical devices composed of hollow carbon nanospheres and carbon nanowires decorated with silver nanoparticles for the quantification of endocrine disruptors in supply water samples
Grantee:Sergio Antonio Spinola Machado
Support Opportunities: Regular Research Grants
FAPESP's process: 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis
Grantee:Osvaldo Novais de Oliveira Junior
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/06139-9 - DEVELOPMENT OF A NANOSTRUCTURED PHOTO-ELECTROCHEMICAL SENSOR FOR P-NITROPHENOL MONITORING IN SUPPLY WATER
Grantee:Camila Domingues Mendonça Verbinnen
Support Opportunities: Scholarships in Brazil - Doctorate