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

• Grant number: 11/11115-8
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• 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
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

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).

Scientific publications

(6)

(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)

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. (11/11115-8, 12/12106-5, 11/19903-5)

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. (11/11115-8, 12/12106-5, 11/19903-5)

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. (12/12106-5, 11/11115-8, 11/19903-5)

BUENO, LIGIA; DE ARAUJO, WILLIAM R.; SALLES, MAIARA O.; KUSSUDA, MARCOS Y.; PAIXAO, THIAGO R. L. C.. Voltammetric Electronic Tongue for Discrimination of Milk Adulterated with Urea, Formaldehyde and Melamine. CHEMOSENSORS, v. 2, n. 4, p. 16-pg., 2014-12-01. (12/12106-5, 11/23355-3, 11/11115-8, 11/19903-5)

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. (11/11115-8, 09/07859-1, 11/19903-5)

THALITA G. SILVA; MAIARA O. SALLES; THIAGO R. L. C. PAIXÃO. INVESTIGAÇÃO DO USO DE ELETRODO DE CARBONO VÍTREO MODIFICADO COM HEXACIANOFERRATO DE RUTÊNIO PARA DETECÇÃO DE PROCAÍNA. Química Nova, v. 38, n. 1, p. 85-90, 2015-01-00. (12/12106-5, 11/11115-8)