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Development of a hibrid tongue (electrochemistry and colorimetric) aiming the discrimination of forensic samples.

Grant number: 11/11115-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): December 01, 2011
Effective date (End): February 28, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal Investigator:Thiago Regis Longo Cesar da Paixão
Grantee:Maiara Oliveira Salles
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil


This project has the aim to develop sensors applied to the analyses of forensic samples, such as explosives and drugs of abuse. The analyses of those samples will be performed with devices named electronic/colorimetric tongues. Those devices use the information obtained with the electrochemical and colorimetric techniques along with chemometrics methods. The construction of the electronic/colorimetric tongues will follow a methodology taking into account the easiness of disseminations, the reproducibility and the accessible price, i.e. the construction of disposable electrodes from gold CDs. The chemometrics analyses will be accomplished mainly by PCA (Principal Component Analysis) and/or HCA (Hierarchical cluster analysis). Quantitative analyses will also be performed with PCR (Principal Component Regression) and PLS (Partial Least Squares).

News published in Agência FAPESP Newsletter about the scholarship:
Researchers develop paper sensors to detect explosives  

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SALLES, MAIARA O.; ARAUJO, WILLIAM R.; PAIXAO, THIAGO R. L. C. Development of a Molecularly Imprinted Modified Electrode to Evaluate Phenacetin Based on the Preconcentration of Acetaminophen. Journal of the Brazilian Chemical Society, v. 27, n. 1, p. 54-61, JAN 2016. Web of Science Citations: 6.
SALLES, M. O.; MELONI, G. N.; DE ARAUJO, W. R.; PAIXAO, T. R. L. C. Explosive colorimetric discrimination using a smartphone, paper device and chemometrical approach. ANALYTICAL METHODS, v. 6, n. 7, p. 2047-2052, 2014. Web of Science Citations: 50.
JUNQUEIRA, JOAO R. C.; DE ARAUJO, WILLIAM R.; SALLES, MAIARA O.; PAIXAO, THIAGO R. L. C. Flow injection analysis of picric acid explosive using a copper electrode as electrochemical detector. Talanta, v. 104, p. 162-168, JAN 30 2013. Web of Science Citations: 32.
DE ARAUJO, WILLIAM R.; SALLES, MAIARA O.; PAIXAO, THIAGO R. L. C. Development of an enzymeless electroanalytical method for the indirect detection of creatinine in urine samples. SENSORS AND ACTUATORS B-CHEMICAL, v. 173, p. 847-851, OCT 2012. Web of Science Citations: 24.

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