High selective SiO2–Al2O3 mixed-oxide modified carbon paste electrode for anodic stripping voltammetric determination of Pb(II)

Nanomaterial/Ionophore-Based Electrode for Anodic Stripping Voltammetric Determination of Lead: An Electrochemical Sensing Platform toward Heavy Metals

“…The proposed electrode has a wider linear dynamic range, lower detection limit, and larger sensitivity than most of the other mercuryfree electrodes for determination of Pb 2+ . 26, [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53] For example, the sensitivity of the NHAP/ionophore/Nafion-modified electrode is almost 48 times that of the HAP-modified platinum electrode, which has an open-circuit accumulation of 30 min. 26 The linear range of the proposed sensor is superior to those using opencircuit accumulation, 26,48-50 and wider than those using electroaccumulation.…”

Carbon Nanotubes/Ionophore Modified Electrode for Anodic Stripping Determination of Lead

“…The detection limit of Pb 2þ for 10-min open-circuit accumulation was calculated to be 1 nM. The proposed electrode has a wider linear dynamic range, lower detection limit, and larger sensitivity than many other mercury free electrodes for determination of Pb 2þ (Ghiaci, Rezaei, and Kalbasi 2007;Zhu et al 2008;Hwang et al 2008a;Guell et al 2008;Hwang et al 2008b). However, compared with our earlier work (Pan et al 2009), the sensitivity and the detection limit of the proposed electrode have not been improved maybe due to the large background current of CNTs (Wang, Kawde, and Musameh 2003).…”

“…Heavy metals can bio-accumulate in the food chain and cause health problems, such as digestive, neurological, cardiac, and mental diseases (Fouskaki and Chaniotakis 2005;Ghiaci, Rezaei, and Kalbasi 2007), and even the formation of malignant tumors because the interaction of heavy metals with DNA can be carcinogenic (Tu et al 2004;Wong, Chow, and Gooding 2007). Among various heavy metals, lead (Pb 2þ ) is of great concern to the public since its compounds are highly toxic.…”

Gold Nanoparticles/Ionophore-Modified Screen Printed Electrode for Detection of Pb(II) in River Water Using Linear Sweep Anodic Stripping Voltammetry

“…Anodic stripping voltammetry (ASV) is considered one of the most sensitive electroanalytical techniques for the determination of trace quantities of heavy metals. (17) To enhance the sensitivity and selectivity of the electrochemical measurement of lead ions, chemically modified electrodes such as bismuth, (18,19) gold nanoparticles, (20,21) titanium dioxide/zirconium dioxide, (22) SiO 2 -Al 2 O 3 mixed oxide, (23) and silica (24) have received increasing attention in the past decades. Table 1 summarizes some electrochemical methods that have been developed for Pb 2+ determination.…”