Determination of Trace Mercury in Saltwaters at Screen-Printed Electrodes Modified with Sumichelate Q10R

Ugo, Paolo; Moretto, Ligia Maria; Bertoncello, Paolo; Wang, Joseph

doi:10.1002/(sici)1521-4109(199810)10:15<1017::aid-elan1017>3.0.co;2-d

Cited by 107 publications

(32 citation statements)

References 18 publications

(30 reference statements)

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“…stage of electrochemical accumulation, FB buff. fluoride-borate buffer, EDTA ethylenediaminetetraacetic acid, DP differential-pulse, CSV cathodic stripping voltammetry, LS linear sweep, ASV anodic stripping voltammetry, SQW square-wave, BGD supporting electrolyte, SS standard sample a "+", after, "−" without oxygen removal 122] modified by inorganic [164][165][166][167], metalorganic [168][169][170][171][172][173][174], and organic substances [175][176][177][178][179][180]; self-assembled layers [181][182][183][184]; macrocyclic compounds [185][186][187]; polymeric films [188,189]; and ion-exchange resins [190,191]. Modified thick-film electrodes provide the detection limit of elements at a level of 10 −8 -10 −10 M. Plasma, laser, temperature, and electrochemical treatments of the surface of thick-film electrodes can influence its activity, increase the rate of electron transitions, and change the electrochemical process reversibility.…”

Section: Thick-film Carbon-containing Electrodesmentioning

confidence: 99%

“…Coatings made by this technology have no cracks and hermetically insulate the fibers. The problem of measuring extremely low currents at the level of nano-and picoamperes on ME is solved by the use DP АSV Waters [190] (G) ink Dowex 50W-X8 bulk Cu (II) 7.9•10 −9 5 mМ FB (рН 5.7) DP АVA Waters [191] For abbreviations aside from those defined here, see Tables 1 and 2 (G) or (C) ink graphite-or carbon-containing ink, (G-E) paste graphite-epoxy paste, PAN polyacrylonitrile, PVC polyvinylchloride, (SGG) paste sol-gel graphite paste, DAN diaminonaphthalene, NRS nitroso-R salt, Hg-DDC mercury diethyldithiocarbamate, Hg-PDTC mercury pyrrolidine dithiocarbamate, HgAc mercury(II) acetate, Au-PDTC aurum pyrrolidine dithiocarbamate, Ac-Phos SAMMS acetamide phosphonic acid selfassembled monolayer on mesoporous silica, SF hetaryl-substituted formazan, SPE/pcPVP 1,5-dibromopentane partially (7%) cross-linked poly(4-vinylpyridine), KHPh potassium hydrophthalate, MB methylene blue, PLH poly-L-histidine, CEBM crown-ether based membrane, AVA anodic voltammetry, PP pharmaceutical preparations, CP cosmetic productions, ES environmental samples of up-to-date, highly sensitive electrochemical equipment or ME arrays (MEA) whose desired signal can be integrated and measured by standard electrochemical analyzers and polarographs. ME systems are made using methods of microelectronics, electron-and ion-beam technologies, Xray and high-temperature lithography, and photolithography.…”

Section: Carbon Microelectrodesmentioning

confidence: 99%

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Modified carbon-containing electrodes in stripping voltammetry of metals. Part II. Composite and microelectrodes

Stozhko

Малахова

Fyodorov

et al. 2007

J Solid State Electrochem

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The second part of the review, which covers modified carbon-containing electrodes, describes composite and microelectrodes. Electrodes made of commercial and laboratory carbon-containing composite materials are discussed. Impregnated and thick-film electrodes and microelectrodes made of carbon fibers form a separate group. Various modifiers and methods of electrode modification are presented. Prospects for the future development of solid-state modified electrodes are considered. [12][13][14][15][16]. In most cases, electrodes of these materials are modified by metal films (mercury, copper, and bismuth), molecularly imprinted TiO 2 [17]. The occurrence in the last decade of new types of carbon materials "from carbon nanotubes to edge plane pyrolytic graphite" [18,19] has significantly changed the scope and sensitivity of electroanalytical methods for the measurement of diverse targets from metals ions to biological markers. Investigators considered in detail electrochemical characteristics [20] and practical use [21] of the "edge" plane pyrolytic graphite, which proved to have a wider interval of working potentials and a low detection limit as compared to those of the basal pyrolytic graphite and GC. For example, in situ bismuth film modified edge plane pyrolytic graphite electrode was successfully applied to the ultra trace simultaneous determination of cadmium(II) and lead(II) with detection limit 5.5·10 −10 and 4·10 −10 M, respectively [22].Synthetic diamonds (nitrogen-[23, 24] and boron-doped ) have come into use quite recently for electrochemical measurements. In particular, a gold-coated, borondoped, diamond thin-film electrode was used for total inorganic arsenic detection in real water samples [50]. Unlike properties of other carbon materials, which are widely used in electroanalysis, properties of synthetic diamonds became the subject of comprehensive study just about 10 years ago. The research was hindered by two circumstances: shortage of the material and the absence of conduction. The situation radically changed with the advent of highly efficient methods for growing of polycrystalline diamond compounds.A more efficient separation, accumulation, and determination of components is achieved with electrodes of composite materials made of graphite, carbon, glassy carbon, or diamond powders and binders such as paraffin, epoxy resins, methacrylate, silicon, styrene-acrylonitrile copolymer, polyester, and silica gel. The reviews [51][52][53][54] deal with properties and applications of various composite J Solid State Electrochem

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Section: Thick-film Carbon-containing Electrodesmentioning

confidence: 99%

Section: Carbon Microelectrodesmentioning

confidence: 99%

Modified carbon-containing electrodes in stripping voltammetry of metals. Part II. Composite and microelectrodes

Stozhko

Малахова

Fyodorov

et al. 2007

J Solid State Electrochem

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“…Although, there has been a lot of published work on the detection of metals with screen-printed electrodes using stripping analysis techniques [6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22], apart from Akhtar et al [6] who described one for aluminium in soil solutions and Kadara et al [8] for copper in soil samples, there have not been any other reports on the application of screen-printed electrodes in connection with stripping analysis to complex matrices like polluted soils and sediments. The analysis of samples that have been carried out are exclusively for simple matrices like drinking [7,9,10,11,12,13], tap [13,14], river [15,16,17], channel [18], lake [19], pond [20,21], ground [21] and potable water [22].…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of samples that have been carried out are exclusively for simple matrices like drinking [7,9,10,11,12,13], tap [13,14], river [15,16,17], channel [18], lake [19], pond [20,21], ground [21] and potable water [22]. Here, we report the simultaneous determination of lead and cadmium in soils extracts and wastewaters by using constant current stripping chronopotentiometry (CCSCP) in conjunction with a disposable screen-printed bismuth film electrode (SPBFE).…”

Section: Introductionmentioning

confidence: 99%

Stripping chronopotentiometric measurements of lead(II) and cadmium(II) in soils extracts and wastewaters using a bismuth film screen-printed electrode assembly

Kadara

Tothill

2004

Analytical and Bioanalytical Chemistry

107

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The key to remediative processes is the ability to measure toxic contaminants on-site using simple and cheap sensing devices, which are field-portable and can facilitate more rapid decision-making. A three-electrode configuration system has been fabricated using low-cost screen-printing (thick-film) technology and this coupled with a portable electrochemical instrument has provided a a relatively inexpensive on-site detector for trace levels of toxic metals. The carbon surface of the screen-printed working electrode is used as a substrate for in situ deposition of a metallic film of bismuth, which allows the electrochemical preconcentration of metal ions. Lead and cadmium were simultaneously detected using stripping chronopotentiometry at the bismuth film electrode. Detection limits of 8 and 10 ppb were obtained for cadmium(II) and lead(II), respectively, for a deposition time of 120 s. The developed method was applied to the determination of lead and cadmium in soils extracts and wastewaters obtained from polluted sites. For comparison purposes, a mercury film electrode and ICP-MS were also used for validation.

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“…Due to the highly toxic nature of this element in both its inorganic and organic forms, the determination of such low levels of mercury in an aquatic environment is of great importance. Most common techniques that have been reported for the determination of total mercury in natural samples include inductively coupled plasma mass spectrometry (ICP-MS), 2 inductively coupled plasma atomic emission spectrometry (ICP-AES), 3,4 gas chromatography coupled to atomic absorption spectrometry (GC-AAS), [5][6][7] cold vapor atomic absorption spectrometry (CV-AAS), [8][9][10][11] atomic fluorescence spectrometry (AFS), 12 anodic stripping voltammetry (ASV), 13,14 and neutron activation analysis (NAA). 15 These techniques are very expensive and suffer from many complicated processing steps.…”

mentioning

confidence: 99%

Flotation–Spectrophotometric Determination of Mercury in Water Samples Using Iodide and Ferroin

Hosseini

Hashemi‐Moghaddam

2004

ANAL. SCI.

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This paper describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of trace amounts of mercury. The method is based on the flotation of an ion-associate of HgI4 2-and ferroin between aqueous and n-heptane interface at pH 5. The ion-associate was then separated and dissolved in acetonitrile to measure its absorbance. Quantitative flotation of the ion-associate was achieved when the volume of the water sample containing Hg(II) was varied over 50 -800 ml. Beer's law was obeyed over the concentration range of 3.2 × 10 -8 -9.5 × 10 -7 mol l -1 with an apparent molar absorptivity of 1 × 10 6 l mol -1 cm -1 for a 500 ml aliquot of the water sample. The detection limit (n = 25) was 6.2 × 10 -9 mol l -1 , and the RSD (n = 5) for 3.19 × 10 -7 mol l -1 of Hg(II) was 1.9%. A notable advantage of the method is that the determination of Hg(II) is free from the interference of the almost all cations and anions found in the environmental and waste water samples. The determination of Hg(II) in tap, synthetic waste, and seawater samples was carried out by the present method and a well-established method of extraction with dithizone. The results were satisfactorily comparable so that the applicability of the proposed method was confirmed in encountering with real samples.

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Determination of Trace Mercury in Saltwaters at Screen-Printed Electrodes Modified with Sumichelate Q10R

Cited by 107 publications

References 18 publications

Modified carbon-containing electrodes in stripping voltammetry of metals. Part II. Composite and microelectrodes

Modified carbon-containing electrodes in stripping voltammetry of metals. Part II. Composite and microelectrodes

Stripping chronopotentiometric measurements of lead(II) and cadmium(II) in soils extracts and wastewaters using a bismuth film screen-printed electrode assembly

Flotation–Spectrophotometric Determination of Mercury in Water Samples Using Iodide and Ferroin

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