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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.)

Selective and sensitive multiplexed detection of pesticides in food samples using wearable, flexible glove-embedded non-enzymatic sensors

Full text
Author(s):
Raymundo-Pereira, Paulo A. [1] ; Gomes, Nathalia O. [2] ; Shimizu, Flavio M. [1, 3] ; Machado, Sergio A. S. [2] ; Oliveira, Jr., Osvaldo N. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13566590 Sao Carlos, SP - Brazil
[3] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: CHEMICAL ENGINEERING JOURNAL; v. 408, MAR 15 2021.
Web of Science Citations: 8
Abstract

On-site monitoring of pesticides in food, water and in the environment is crucial for human health, and this requires low cost, portable devices for widespread deployment of the technology. In this paper, we report on selective, sensitive detection and discrimination of four classes of pesticides, namely carbendazim (carbamate), diuron (phenylamide), paraquat (bipyridinium) and fenitrothion (organophosphate), using a set of three glove-embedded sensors printed on three fingers of a rubber glove. The sensors consisted of a pre-treated screen-printed carbon electrode and two other such electrodes coated with either carbon spherical shells (CSS) or Printex carbon nanoballs (PCNB). Detection of carbendazim and diuron was performed using differential pulse voltammetry (DPV) and the electrodes coated with CSS and PCNB, respectively, with limits of detection of 4.7 x 10(-8) and 9.2 x 10(-7) mol L-1. Square wave voltammetry (SWV) was applied to detect paraquat and fenitrothion with limits of detection 2.4 x 10(-8) and 6.4 x 10(-7) mol L-1 using the pretreated electrode in sulfuric acid solution. The high performance and discrimination of the pesticides at distinct concentrations in real samples of apple and cabbage by simply touching with the glove, and in orange juice by immersing the fingers was demonstrated with multidimensional projections. The sensors were robust against flexion in multiple times, stable and had reproducible response with no interference from other pesticides. With their high selectivity, sensitivity, easy operation and rapid pesticide detection, these glove-embedded sensors may also be employed in on-site analysis of other chemical threats and be extended to environmental and water samples. (AU)

FAPESP's process: 16/01919-6 - Design and fabrication of nanostructured flexible devices for biomarkers detection
Grantee:Paulo Augusto Raymundo Pereira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
Grantee:Osvaldo Novais de Oliveira Junior
Support Opportunities: Research Projects - Thematic 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: 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