Disposable Screen-Printed Electrodes (Spe) Mercury-Free for Lead Detection
2000; Taylor & Francis; Volume: 33; Issue: 7 Linguagem: Inglês
10.1080/00032710008543119
ISSN1532-236X
AutoresIlaria Palchetti, Christa Upjohn, Anthony Turner, Marco Mascini,
Tópico(s)Electrochemical sensors and biosensors
ResumoABSTRACT ABSTRACT Strategies to modify screen-printed electrodes (SPE) for lead determination are reported. Dithizone was mixed with graphite ink to obtain a modified screen-printed strip to detect ppb levels of lead(II) (detection limit 12 μg/l) using square wave anodic stripping voltammetry (SWASV). In addition, screen-printed electrodes were also modified by casting a few μl of a Nafion® solution onto the working electrode surface. In this case, ppb levels of lead were detected (detection limit 15 μg/1), using potentiometric stripping analysis (PSA). The addition of an ionophore to Nafion® polymer was also investigated, but this did not yield a significant improvement. Keywords:: Screen-printed electrodesdithizoneNafion®lead detectionpotentiometric stripping analysissquare wave anodic stripping voltammetry
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