Square wave anodic stripping voltammetry at the mercury film electrode: theoretical treatment

Remote Stripping Analysis of Lead and Copper by a Mercury‐Coated Platinum Microelectrode

“…It can be observed that also in ASV experiments, the signals are very similar regardless of the fact that the mercury microelectrode is connected or not to the remote system, being the differences in the ASV parameters within 3%. In particular, it is worth noticing that w 1/2 values obtained here compare quite well with the theoretical value of 49.6 mV for SWV, and the experimental value of 45 mV reported in the literature for LSV for thin mercury film electrodes [23,24]. Moreover, the agreement between w 1/2 data obtained with the MM-RS and MM systems indicates that, in the anodic stripping mode, the contribution of the capacitive current on the voltammetric response is negligible even in connection to LSV technique.…”

Square-wave anodic-stripping voltammetric determination of Cd, Pb and Cu in wine: Set-up and optimization of sample pre-treatment and instrumental parameters

“…The thickness (l) of the film, computed from the geometric area of the graphite disc support and from the mean current measured during the Hg deposition, was 3.5 × 10 −5 ± 0.3 × 10 −5 cm [66]; so, according to the literature [62,65], our electrode can be regarded as a thin mercury film electrode (TMFE).…”

“…During the set-up of the SWASV, to optimize the sensitivity and selectivity of the technique, and to study the electrodic mechanism by comparing experimental results with the theoretical behaviour predicted for reversible systems when the TMFE is used [62,65], the most important settings involved in square-wave modulation of the potential were varied using the following procedure. First, SW amplitude (E SW ) and frequency (f) were varied over the full ranges available in the instrument, i.e.…”

“…The OIV [15] sets the following maximum levels for the three metals: Cd 0.01 mg L −1 , Pb 0.15 mg L −1 (starting from the 2007 harvest year) and Cu 1 mg L −1 . The voltammetric behaviour of the three metals was studied according to theoretical predictions for SWASV with TMFE [62,65].…”

Wax-Impregnated Carbon Paste Electrode Modified with Mercuric Oxalate for the Simultaneous Determination of Heavy Metal Ions in Medicinal Plants and Ayurvedic Tablets

“…[1][2][3] Differential pulse voltammetric methods have an advantage over linear scan stripping in that they discriminate effectively against charging current. [4][5][6] Even though some other analytical methods, such as atomic absorption, inductive coupled plasma, X-ray fluorescence spectrometry and neutron activation analysis, 7 have also been used for the trace analysis of metal ions, they involve high cost and maintenance and complicated procedures for analysis. Because of mercury's high toxicity, stability and volatility, use of metallic mercury to detect toxic heavy metal ions is a debatable issue.…”