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

被引:66
|
作者
Silva, Thalita G. [1 ]
de Araujo, William R. [1 ]
Munoz, Rodrigo A. A. [2 ]
Richter, Eduardo M. [2 ]
Santana, Mario H. P. [3 ]
Coltro, Wendell K. T. [4 ]
Paixao, Thiago R. L. C. [1 ]
机构
[1] Univ Sao Paulo, Inst Quim, BR-05508000 Sao Paulo, SP, Brazil
[2] Univ Fed Uberlandia, Inst Quim, BR-38400902 Uberlandia, MG, Brazil
[3] Superintendencia Reg Dept Policia Fed MG, Unidade Tecn Cient, BR-38408680 Uberlandia, MG, Brazil
[4] Univ Fed Goias, Inst Quim, Campus Samambaia, BR-74690900 Goiania, Go, Brazil
基金
巴西圣保罗研究基金会;
关键词
LOW-COST; MICROFLUIDIC DEVICES; COCAINE; FABRICATION; QUANTIFICATION; ACID;
D O I
10.1021/acs.analchem.6b00072
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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 40 mu mol L-1 with a detection limit of 0.9 mu mol L-1. The accuracy of the proposed method was evaluated using seized cocaine samples and an addition and recovery protocol.
引用
收藏
页码:5145 / 5151
页数:7
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