Nikola Tasić, Lucas de Sousa de Oliveira, Thiago R. L. C. Paixão, Luís Moreira Gonçalves
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引用次数: 7
摘要
一次性丝网印刷电极相对经济,但对低收入国家来说,如果包括运输成本,它们可能不够便宜,而这些地方往往需要就地进行水分析。这项工作展示了应用激光热解纸电极(LPPEs)进行铅(Pb)定量的概念证明。通过使用市售的二氧化碳激光器简单而小心地燃烧普通纸板,就有可能制造出以碳基材料作为电活性表面的低成本电极。采用方波阳极溶出伏安法(SWASV),以锌(Zn)作为内标(Ep = - 1.02 vs. Ag),铅(Ep = - 0.46 V vs. Ag)的检出限(LOD)为6 ppb,其他合适的分析性能参数,如重复性为4%,再现性为5%。
Laser-pyrolysed paper electrodes for the square-wave anodic stripping voltammetric detection of lead
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.