Adsorptive stripping voltammetric determination of chromium in gallium

Palrecha, M. M.; Mathur, P.K.

doi:10.1016/s0039-9140(97)00150-1

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…Early work of electrochemical detection of Cr(VI) started with mercury electrodes . Adsorptive stripping voltammetric measurements at mercury electrodes in the presence of complexing agents (diethylenetriamene pentaacetate , , triethylenetetranitrilo-hexaacetic acid , , bipyridyne , pyrocatechol violet , , and Cupferron , or masking agent (Nitrilotriacetic acid have been reported and used for Cr(VI) detection in different samples. Although mercury electrodes exhibit the highest sensitivity, the potential toxicity and its operation limitations prevent its application in analytical practice.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Detection of Cr(VI) with Disposable Screen-Printed Electrode Modified with Gold Nanoparticles

Liu

Lin

Wang

et al. 2007

Environ. Sci. Technol.

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Gold nanoparticle (Au-NP) enhanced voltammetric detection of Cr(VI) is developed for determination of trace amounts of Cr(VI) in an acetate buffer media (pH 4.6). The Au-NPs were electrodeposited onto a disposable screen printed electrode (SPE) via an electrodeposition step. It was found that the electrodeposited Au-NP has strong adsorption on Cr(VI) species, which results in an enhanced reduction current of Cr(VI). Compared with the bulk gold electrode, the reduction current of Cr(VI) was enhanced 10 times with the Au-NP-modified SPE electrode. Square wave voltammetric (SWV) measurement with the disposable Au-NP-modified SPE provides a fast, simple and sensitive detection of trace amounts of Cr(VI). The adsorption of Cr(VI) on Au-NP was characterized with voltammetry, X-ray photoelectron spectroscopy and ultraviolet spectra. The different parameters including the electrodepositing time, supporting electrolyte, and pH that govern the analytical performance of the electrode have been studied in detail and optimized. The detection limit of 5 microg L(-1) Cr (VI) was obtained under optimum experimental conditions. The performance of the sensor was successfully evaluated with river water samples spiked with Cr(VI), indicating this convenient and sensitive technique offers great promise for onsite environmental monitoring and biomonitoring of Cr(VI).

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Section: Introductionmentioning

confidence: 99%

Voltammetric Detection of Cr(VI) with Disposable Screen-Printed Electrode Modified with Gold Nanoparticles

Liu

Lin

Wang

et al. 2007

Environ. Sci. Technol.

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“…Another problem raised was the working electrode used in the AdSV method. Currently, most studies on the AdSV method use hanging mercury drop electrodes (HMDEs) [21][22][23][24][25][26][27][28][29][30][31][32][33][34], or static mercury drop electrodes (SMDE) [19,35] which are expensive and very difficult to fabricate. Research on the use of mercury film electrode (MFE) and bismuth film electrode on glassy carbon disk surface (BiFE), which are less expensive and easier to fabricate, and environmentally friendly BiFE has been improved.…”

Section: Introductionmentioning

confidence: 99%

“…Most studies use HMDE electrodes, some use MFE electrodes, and there are also many ex situ BiFE electrodes [10,11,14,16,17,36] and gold film electrodes (AuFE) [13,15,[37][38][39], and the later modified electrodes [20,36,[40][41][42][43][44] are applied more for chromium analysis in complex objects. e complex ligands used are DTPA [1,21,22,25,26,28,32,35,45], triethylenetetramine hexaacetic acid (TTHA) [19,29,31,37], diphenylcarbazide (DPCB) [23,29], pyrocatechol violet [24,30], pyrogallol [34], rubeanic acid [33], neo TT [40], and quercetin [20], and the common base ingredients are CH 3 COONa, acetate buffer (CH 3 COOH/CH 3 COONa), and CH 3 COONa/NaNO 3 ; all studies analyzed chromium in river water, seawater, groundwater, tea water, and wastewater, and almost no works have analyzed chromium in sediments by the adsorptive stripping voltammetry method and no author has used in situ BiFE to analyze chromium in environmental objects. Overall, studies have achieved very low detection limits from 10 -9 to 10 -10 M (or from 0.05 ppb to 0.005 ppb).…”

Section: Introductionmentioning

confidence: 99%

Determination of Chromium in Natural Water by Adsorptive Stripping Voltammetry UsingIn SituBismuth Film Electrode

Huệ

Hop

Long

et al. 2020

Journal of Environmental and Public Health

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Development of adsorptive stripping voltammetry (AdSV) combined with in situ prepared bismuth film electrode (in situ BiFE) on glassy carbon disk surface using diethylenetriamine pentaacetic acid (DTPA) as a complexing agent and NO3− as a catalyst to determine the trace amount of chromium (VI) is demonstrated. According to this method, in the preconcentration step at Edep = −800 mV, the bismuth film is coated on the surface of glassy carbon electrodes simultaneously with the adsorption of complexes Cr(III)-DTPA. In addition to the influencing factors, the stripping voltammetry performance factors such as deposition potential, deposition time, equilibration time, cleaning potential, cleaning time, and technical parameters of differential pulse and square wave voltammetries have been investigated, and the influence of Cr(III), Co(II), Ni(II), Ca(II), Fe(III), SO42−, Cl−, and Triton X has also been investigated. This method gained good repeatability with RSD <4% (n = 9) for the differential pulse adsorptive stripping voltammetry (DP-AdSV) and RSD < 3% (n = 7) for the square wave adsorptive stripping voltammetry (SqW-AdSV), and low limit of detection: LOD = 12.10−9 M ≈ 0.6 ppb (at a deposition potential (Edep) of −800 mV and the deposition time (tdep) of 50 s) and LOD = 2.10−9 M ≈ 0.1 ppb (at Edep = −800 mV and tdep = 160 s) for the DP-AdSV and SqW-AdSV, respectively. This method has been successfully applied to analyze chromium in natural water.

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“…Different organic reactants are known that can take part simultaneously in both phenomena (adsorptive and catalytic): dimethylglyoxime [2], diphenylcarbazide [3,4,5], cupferron [6], diethylenetriaminepentaacetic acid (DTPA) [7,8,9,10,11] and triethylenetetraminehexaacetic acid (TTHA) [12,13,14]. The most intensively studied among these are TTHA and especially DTPA.…”

Section: Introductionmentioning

confidence: 99%

Determination of Cr (in small quantities) by adsorptive stripping voltammetry: a comparative study of square wave versus differential pulse

Misiego

Carra

Carracedo

et al. 2003

Analytical and Bioanalytical Chemistry

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The usefulness of an analytical method must be measured according to its practical application possibilities. A comparative study has been carried out here between the SW (working in an open atmosphere) and DP (working with de-aerated solutions) variants of catalytic-stripping adsorptive voltammetry applied to the determination of chromium traces in triethylenetetraminehexaacetic acid (TTHA) medium. In order to optimise the analytical signal, accumulation potential, nitrate ion concentration, pH, and TTHA concentration parameters were evaluated. Four linearity ranges were established within the interval 0.5-2000 nmol L(-1) chromium concentration in the cell, each with the recommended accumulation time. Quality parameters such as repeatability, linear regression, validity limits, precision, and sensitivity were evaluated. The SW variant is significantly advantageous when the chromium concentration in cell is less than 10 nmol L(-1) and even more if analysis time, cost, and being able to work in an open atmosphere are considered. The results are comparable to those obtained using GTAAS. Employing a CRM (tomato leaves), the accuracy is 1-4%. The proposed procedure, using tree leaves as samples, has been successfully tested for the possible monitoring of chromium contamination of the atmosphere.

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Adsorptive stripping voltammetric determination of chromium in gallium

Cited by 13 publications

References 3 publications

Voltammetric Detection of Cr(VI) with Disposable Screen-Printed Electrode Modified with Gold Nanoparticles

Voltammetric Detection of Cr(VI) with Disposable Screen-Printed Electrode Modified with Gold Nanoparticles

Determination of Chromium in Natural Water by Adsorptive Stripping Voltammetry UsingIn SituBismuth Film Electrode

Determination of Cr (in small quantities) by adsorptive stripping voltammetry: a comparative study of square wave versus differential pulse

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