Laser-pyrolysed paper electrodes for the square-wave anodic stripping voltammetric detection of lead

被引：6
|
作者：
Tasić, Nikola [1 ]
de Sousa de Oliveira, Lucas [1 ]
Paixão, Thiago R. L. C. [1 ,2 ]
Moreira Gonçalves, Luís [1 ]
机构：
[1] Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo (USP), São Paulo, Brazil
[2] Instituto Nacional de Ciência e Tecnologia de Bioanalítica, Campinas, Brazil
来源：
Medical Devices and Sensors | 2020年 / 3卷 / 06期
关键词：
Carbon dioxide lasers - Chemical detection - Analytic equipment - Stripping voltammetry - Cost benefit analysis;
D O I：
10.1002/mds3.10115
中图分类号：
学科分类号：
摘要：
Single-use screen-printed electrodes are relatively economical, still, they may not be cheap enough for low-income countries when including shipping costs, places where often in situ water analysis is of great relevance. This work displays the proof of concept of applying laser-pyrolysed paper electrodes (LPPEs) for lead (Pb) quantification. By simply and carefully burning ordinary cardboard with a commercially available CO2 laser, it was possible to fabricate low-cost electrodes with a carbon-based material as the electroactive surface. By means of square-wave anodic stripping voltammetry (SWASV), and using zinc (Zn) as an internal standard (Ep = −1.02 vs. Ag), a limit of detection (LOD) of 6 ppb was attained for lead (Ep = −0.46 V vs. Ag) along with other suitable analytical performance parameters, such as 4% of repeatability and 5% of reproducibility. © 2020 Wiley Periodicals LLC
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