Mercury Detection in Seawater Using a Mercaptoacetic Acid Modified Gold Microwire Electrode

Widmann, Antje; Berg, Constant M.G. van den

doi:10.1002/elan.200403159

Cited by 38 publications

(28 citation statements)

References 25 publications

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“…[23] Furthermore this detection range and limit is superior to gold plated graphite electrodes [9], a mercaptoacetic acid modified gold microwire electrode [24], boron-doped diamond electrodes [6,7] and comparable to a BDD rotating disk electrode. [8] Next, the above experiment was repeated using only one of the arrays.…”

Section: Resultsmentioning

confidence: 99%

Trace Detection of Mercury(II) Using Gold Ultra-Microelectrode Arrays

Ordeig¹,

Banks²,

Campo³

et al. 2006

Electroanalysis

100

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The electroanalytical detection of trace mercury(II) at gold ultra-microelectrode arrays is reported. The arrays consist of 256 gold microelectrodes of 5 mm in diameter in cubic arrangements which are separated from their nearest neighbor by 100 mm. The array was utilized in nitric acid using linear sweep voltammetry where a linear response from mercury additions over the range 10 mg L À1 À 200 mg L À1 (10 À8 À 10 À6 M) was observed with a sensitivity and detection limit of 0.11 nC/mg L À1 and 3.2 mg L À1 (16 nM) respectively from using a deposition time of 30 s at À 0.2 V (vs. SCE). This methodology was explored in 0.1 and 1 M chloride media over the mercury range 10 mgwhere similar sensitivities of 0.087 nC/mg L À1 and 0.078 nC/mg L À1 were observed with an identical detection limit. The protocol is demonstrated to be useful for the determination of mercury for analysis of environmental water samples.

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Section: Resultsmentioning

confidence: 99%

Trace Detection of Mercury(II) Using Gold Ultra-Microelectrode Arrays

Ordeig¹,

Banks²,

Campo³

et al. 2006

Electroanalysis

100

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“…The voltammograms of mercury on gold electrodes are characterized by a broad baseline, which makes difficult to measure the peak height directly, especially at low (µg L -1 level) analyte concentrations [34,39,42]. In fact, the presence of chloride ions results in the formation of Hg 2 Cl 2 which is scarcely soluble in water (pKs=17.9) and precipitates onto the electrode surface [43].…”

Section: Determination Of Methylmercurymentioning

confidence: 99%

Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode

et al. 2009

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This study outlines the development of a procedure for the determination of methylmercury by anodic stripping voltammetry at a gold nanoparticle-modified glassy carbon electrode (AuNPs-GCE) and for the differentiation between methylmercury and inorganic mercury. The signal of methylmercury was measured in the square wave mode using HCl as the supporting electrolyte. The procedure had good accuracy, repeatability and linearity. The determination of total mercury in solutions containing both methylmercury and inorganic mercury was performed after converting the former into the inorganic form. Different sample solution pre-treatments were tested for this purpose, and an acid digestion in a microwave oven with HNO 3 and H 2 O 2 was found to be the most effective. The selective determination of methylmercury in the presence of inorganic mercury was possible after masking the latter through reduction to the elemental state with SnCl 2 . The amount of inorganic mercury was determined by difference.

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“…Similar sensitivity is achieved when the modification is performed with macrocyclic polyamine [24]. Besides the modification of various carbon electrodes, gold microwire electrode was modified as well in order to eliminate the problem of calomel formation when the determination was performed in sea water [25].…”

mentioning

confidence: 92%

Determination of Mercury by Chronopotentiometric Stripping Analysis Using Glassy Carbon Vessel as a Working Electrode

Švarc‐Gajić¹,

Suturović²,

Marjanović³

et al. 2006

Electroanalysis

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In this work chronopotentiometric stripping analysis of mercury was performed using a process vessel of glassy carbon as a working electrode. Experimental parameters for both steady and rotating vessel were investigated and compared. Relative sensitivity as well as the sharpness of the analytical signal was better when the rotation of the process vessel was performed. The new design provided better sensitivity when compared to both stationary and rotating glassy carbon disk electrodes. Detection limit obtained for the electrolysis time of 600 s was 0.1 ng/L of Hg(II). The accuracy of the technique was confirmed by analyzing the standard reference material -tomato leaves.

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Mercury Detection in Seawater Using a Mercaptoacetic Acid Modified Gold Microwire Electrode

Cited by 38 publications

References 25 publications

Trace Detection of Mercury(II) Using Gold Ultra-Microelectrode Arrays

Trace Detection of Mercury(II) Using Gold Ultra-Microelectrode Arrays

Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode

Determination of Mercury by Chronopotentiometric Stripping Analysis Using Glassy Carbon Vessel as a Working Electrode

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