Voltammetric determination of trace mercury in concentrated chloride media using polymer-film electrodes modified with polyammonium macrocyclic receptors

Doménech, Antonio; Doménech‐Carbó, María Teresa; Garcı́a-España, Enrique; Soriano, Miguel

doi:10.1039/a905366b

Cited by 14 publications

(9 citation statements)

References 42 publications

(53 reference statements)

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“…For example, the modified carbon paste electrodes with humic acid [1], anion-exchanger [2] as well as poly(4-vinylpyridine) and Kryptofix-222 [3] have been reported (detection limits are 5×10 -10 mol L -1 , 1 µg L -1 and 10 -9 mol L -1 , respectively). Otherwise, the gold(III)/pyrrolidinethiocarbamate complex modified graphite electrodes with detection limits of 5 ng L -1 [4] and the polymer film electrodes modified by macrocyclic polyamine, which can determine 2×10 -11 mol L -1 Hg 2+ [5], have also been published. Recently, Huang reported a sodium montmorillonite (SWy-2) modified carbon paste electrode, which can detect 1×10 -10 mol L -1 Hg 2+ [6].…”

Section: Introductionmentioning

confidence: 98%

Anodic stripping voltammetric determination of mercury using multi-walled carbon nanotubes film coated glassy carbon electrode

Yi¹

2003

Analytical and Bioanalytical Chemistry

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An electrochemical method for the determination of trace levels of mercury based on a multi-walled carbon nanotubes (MWNT) film coated glassy carbon electrode (GCE) is described. In 0.1 mol L(-1) HCl solution containing 0.02 mol L(-1) KI, Hg(2+) was firstly preconcentrated at the MWNT film and then reduced at -0.60 V. During the anodic potential sweep, reduced mercury was oxidized, and then a sensitive and well-defined stripping peak at about -0.20 V appeared. Under identical conditions, a MWNT film coated GCE greatly enhances the stripping peak current of mercury in contrast to a bare GCE. Low concentrations of I(-) remarkably improve the determining sensitivity, since this increases the accumulation efficiency of Hg(2+) at the MWNT film coated GCE. The stripping peak current is proportional to the concentration of Hg(2+) over the range 8 x 10(-10)-5 x 10(-7) mol L(-1). The lowest detectable concentration of Hg(2+) is 2 x 10(-10) mol L(-1) at 5 min accumulation. The relative standard deviation (RSD) at 1 x 10(-8) mol L(-1) Hg(2+) was about 6% ( n=10). By using this proposed method, Hg(2+) in some water samples was determined, and the results were compared with those obtained by atomic absorption spectrometry (AAS). The two results are similar, suggesting that the MWNT-film coated GCE has great potential in practical analysis.

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Section: Introductionmentioning

confidence: 98%

Anodic stripping voltammetric determination of mercury using multi-walled carbon nanotubes film coated glassy carbon electrode

Yi¹

2003

Analytical and Bioanalytical Chemistry

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“…Graphite electrode modified with Au(III)/ pirolydinedithyocarbamate complex can offer detection limit down to 5 ng/L of mercury [23]. 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].…”

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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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“…Numerous studies have been directed to the determination of mercury(II) ion by modified electrodes. The modifiers used have included organic chelating groups [16][17][18][19][20][21][22][23], polymers [24][25][26][27][28][29], silica and sol-gel [30][31][32][33][34], clays [35][36][37][38][39][40] and clays grafted with organic chelating groups [41]. Most of the procedures, however, have faced difficulties achieving the sensitivity required for the determination of low levels of mercury(II) ion in some real samples.…”

Section: Introductionmentioning

confidence: 99%

Application of an Hg2+ selective imprinted polymer as a new modifying agent for the preparation of a novel highly selective and sensitive electrochemical sensor for the determination of ultratrace mercury ions

Alizadeh

Ganjali

Zare

2011

Analytica Chimica Acta

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Voltammetric determination of trace mercury in concentrated chloride media using polymer-film electrodes modified with polyammonium macrocyclic receptors

Cited by 14 publications

References 42 publications

Anodic stripping voltammetric determination of mercury using multi-walled carbon nanotubes film coated glassy carbon electrode

Anodic stripping voltammetric determination of mercury using multi-walled carbon nanotubes film coated glassy carbon electrode

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

Application of an Hg2+ selective imprinted polymer as a new modifying agent for the preparation of a novel highly selective and sensitive electrochemical sensor for the determination of ultratrace mercury ions

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