Anodic Stripping Voltammetric Determination of Mercury(II) in Water Using a 4‐Tert‐Butyl‐1‐(Ethoxycarbonylmethoxy)Thiacalix[4]Arene Modified Glassy Carbon Electrode

Abstract

A glassy carbon electrode coated the film of 4-tert-butyl-1-(ethoxycarbonylmethoxy)thiacalix[4]arene is designed for the determination of trace amounts of Hg 2+ . Compared with bare glassy carbon electrode, the modified electrode can improve the measuring sensitivity of Hg 2+ . Under the optimum experimental condition, the modified electrode in 0.1 mol L -1 H 2 SO 4 + 0.01 mol L -1 KCl solution shows a linear voltammetric response in the range of 8.0´10 -9~3 .0´10 -6 mol L -1 with detection limit 5.0´10 -9 mol L -1 for Hg 2+ . The high sensitivity, selectivity, and stability of modified electrode also prove its practical application for a simple, rapid and economical determination of Hg 2+ in water samples.

Square Wave Anodic Stripping Voltammetric Determination of Hg(II) with N1‐Hydroxy‐N1,N2‐diphenylbenzamidine Modified Carbon Paste Electrode

“…Electrochemical impendence spectroscopy (EIS) and cyclic voltammetry (CV) were used for the electrochemical properties and electrode interfaces characterization of the bare CPE and HDPBA-CPE. For EIS measurements a potential of 0 V vs Ag/AgCl was applied and EIS spectra were recorded in frequency region from 1 Hz up to 100000 Hz with amplitude 0.005 V in 5 mM K towards the electrode surface [32][33][34][35], which obviously proves HDPBA is successfully immobilized on the CPE surface. The electrochemical impedance spectroscopy results are in accordance with the cyclic voltammetry results (Figure 4).…”

“…Furthermore, several complex steps must be performed that require specially trained personnel [15]. Electrochemical methods, in particular anodic stripping voltammetry (ASV), is the most versatile technique for the determination of trace level of mercury due to its low cost, simplicity, speed, high sensitivity and the ability to carry out speciation analysis [16].…”

Sodium doping effect on physicochemical properties of K 1−x Na x CaPb 3 (PO 4 ) 3 (0 ≤ x ≤ 1) for the determination of mercury(II): Application in seawater samples

“…As a consequence of this pollution, mercury can accumulate in the human body causing a wide variety of diseases, even in a low concentration, such as digestive, kidney and especially neurological disorders [6]. The determination of mercury is necessary and urgent at trace levels in all compartment of environment [7,8]. Some analytical techniques have been employed in metal analysis, such as atomic absorption spectrometry (AAS) [9,10], atomic fluorescence spectrophotometry (AFS) [11,12] and inductively coupled plasma (ICP) [13,14].…”

Voltammetric studies on mercury behavior in different aqueous solutions for further development of a warning system designed for environmental monitoring

“…Chemically modified electrodes have received increasing attention, which has led to improvements in the sensitivity and selectivity of electrochemical analysis techniques in the recent decades. The determination of Hg(II) ions using chemically modified electrodes has been investigated recently, using plants [14], gold film [15], polymer films [16] or organic compounds with chelating groups [17].…”

“…The behavior of electrodes has also been studied using modified a carbon paste electrode [18], modified glass carbon electrode [17] or modified gold nanoelectrode ensembles [19].…”