A Nafion-coated bismuth film electrode for the determination of heavy metals in vegetable using differential pulse anodic stripping voltammetry: An alternative to mercury-based electrodes

Determination of Lead by Square Wave Anodic Stripping Voltammetry Using an Electrochemical Sensor

“…Accumulation times in the range 40 -600 s were also studied for a solution containing 25 μg L -1 Pb 2+ in 0.1 mol L -1 acetate buffer on a Nafion-coated bismuth film electrode. 33 The peak heights showed a linear increase before 420 s, whereas at longer deposition times, the plots of peak height versus time started to deviate from linearity. Laschi et al 34 fabricated a novel gold-based screen-printed sensor using accumulation times varying from 0 to 420 s that evaluated the influence of the lead stripping peak current intensities.…”

“…Nafion-coated bismuth film electrode was also reported for lead determination by differential pulse ASV, and the electrode was investigated for heavy metal analysis in vegetable samples. 33 Under appropriate conditions, a determination limit of 0.17 μg L -1 was obtained for Pb at a preconcentration time of 180 s and a deposition potential of -1.4 V; the glassy carbon electrode coated with low-toxicity bismuth provided another successful potential application. 33 With the advantages of using a modified electrode, the screen-printed chip with a convenient operating procedure required only a small sample volume for lead analysis and was very suitable for field testing.…”

A novel tin-bismuth alloy electrode for anodic stripping voltammetric determination of zinc

“…2+ at the SnBiE According to the literature [33], at bare glassy carbon electrode (GCE), the stripping peak of zinc was not be observed. However, in 0.1 M acetate buffer solution (pH 5.0) containing the same concentration of Zn 2+ (0.5 μM), there is an obvious stripping peak at −1.175 V at SnBiE (Fig.…”

Determination of Cd(II) Ions by using Cyclodextrin Based Polymeric Fluorescence Sensor

“…For this reason, many methods including differential pulse anodic stripping voltammetry (DPASV) (4,5), flame atomic absorption spectrometry (FAAS) (6), inductively coupled plasma optical emission spectrometry (ICP-OES) (7), potentiometry (8-9), spectrofluorimetry (10, 11), spectrophotometry (12,13) and inductively coupled plasma atomic emission spectroscopy (ICP-AES) (14) have been developed. These methods can provide wide linear range values and good detection limits, but they need to use very expensive devices in the laboratory and a qualified staff for the application.…”