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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.)

Portable and low-cost colorimetric office paper-based device for phenacetin detection in seized cocaine samples

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Author(s):
da Silva, Gabriela O. [1] ; de Araujo, William R. [1] ; Paixao, Thiago R. L. C. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Av Prof Linea Prestes 748, Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Talanta; v. 176, p. 674-678, JAN 1 2018.
Web of Science Citations: 12
Abstract

An office paper-based colorimetric device is proposed as a portable, rapid, and low-cost sensor for forensic applications aiming to detect phenacetin used as adulterant in illicit seized materials such as cocaine. The proposed method uses white office paper as the substrate and wax printing technology to fabricate the detection zones. Based on the optimum conditions, a linear analytical curve was obtained for phenacetin concentrations ranging from 0 to 64.52 mu g mL(-1), and the straight line was in accordance with the following equation: (Magenta percentage color) = 1.19 + 0.458 (C-phe/mu g mL(-1)), R-2 = 0.990. The limit of detection was calculated as 3.5 mu g mL(-1) (3 sigma/slope). The accuracy of the proposed method was evaluated using real seized cocaine samples and the spike-recovery procedure. (AU)

FAPESP's process: 17/10522-5 - Development of alternative methods for fabrication of electrochemical paper-based sensors
Grantee:Thiago Regis Longo Cesar da Paixão
Support Opportunities: Regular Research Grants
FAPESP's process: 11/19903-5 - Development of electroanalytical methods for detection/discrimination of drugs of abuse, its adulterants and explosives in forensic samples
Grantee:William Reis de Araujo
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 16/16477-9 - Fabrication of portable paper-based analytical devices with electrochemical and colorimetric detection system aiming at forensic, clinical, and environmental applications
Grantee:William Reis de Araujo
Support Opportunities: Scholarships in Brazil - Post-Doctoral