Simple and Sensitive Paper-Based Device Coupling Electrochemical Sample Pretreatment and Colorimetric Detection

Silva, Thalita Guedes; Araujo , William Reis de; Abarza Munoz, Rodrigo Alejandro; Richter , Eduardo Mathias; Santana, Mario Henrique Palis; Coltro, Wendell Karlos Tomazelli; Paixão, Thiago Regis Longo Cesar da

Simple and Sensitive Paper-Based Device Coupling Electrochemical Sample Pretreatment and Colorimetric Detection

Data

2016-04

Autores

Silva, Thalita Guedes

Araujo , William Reis de

Abarza Munoz, Rodrigo Alejandro

Richter , Eduardo Mathias

Santana, Mario Henrique Palis

Coltro, Wendell Karlos Tomazelli

Paixão, Thiago Regis Longo Cesar da

Resumo

We report the development of a simple, portable, low-cost, high-throughput visual colorimetric paper-based analytical device for the detection of procaine in seized cocaine samples. The interference of most common cutting agents found in cocaine samples was verified, and a novel electrochemical approach was used for sample pretreatment in order to increase the selectivity. Under the optimized experimental conditions, a linear analytical curve was obtained for procaine concentrations ranging from 5 to 60 μmol L–1, with a detection limit of 0.9 μmol L–1. The accuracy of the proposed method was evaluated using seized cocaine samples and an addition and recovery protocol.

Citação

SILVA, Thalita Guedes et al. Simple and Sensitive Paper-Based Device Coupling Electrochemical Sample Pretreatment and Colorimetric Detection. Analytical Chemistry, Washington, v. 88, n. 10, p. 5145-5151, 2016. DOI: 10.1021/acs.analchem.6b00072. Disponível em: https://pubs.acs.org/doi/10.1021/acs.analchem.6b00072. Acesso em: 8 ago. 2024.