Indirect determination of hexavalent chromium ion in complex matrices by adsorptive stripping voltammetry at a mercury electrode

Safavi, Afsaneh; Maleki, N.; Shahbaazi, Hamidreza

doi:10.1016/j.talanta.2005.07.015

Cited by 29 publications

(19 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An interesting example of indirect determination of Cr(VI) traces, based on the linear decrease of the AdSV response of the Cu(II)-adenine complex with the increase of the concentration of Cr(VI), was reported by Safavi et al [91].…”

Section: Catalytic Adsorptive Stripping Voltammetry In Chromium Determentioning

confidence: 99%

Characteristics of Voltammetric Determination and Speciation of Chromium – A Review

2009

View full text Add to dashboard Cite

This article reviews the voltammetric methods of chromium determination, including adsorptive and catalytic adsorptive stripping voltammetry at liquid mercury, metallic films, and modified carbon paste electrodes. The principle applications of the catalytic adsorptive stripping voltammetric method of chromium(VI) determination in the presence of DTPA and nitrate, most useful in the analysis of chromium traces and its speciation, is presented in detail. Special emphasis is put on the presentation and characterization of the voltammetric procedures which make it possible to conduction speciation studies of chromium(VI) in the presence of a great excess of chromium(III) and surfactants. This survey is based on 173 articles.

show abstract

Section: Catalytic Adsorptive Stripping Voltammetry In Chromium Determentioning

confidence: 99%

Characteristics of Voltammetric Determination and Speciation of Chromium – A Review

2009

View full text Add to dashboard Cite

show abstract

“…La protection de la surface de l'électrode contre l'effet des interférents organiques qui sont habituellement présents dans des échantillons réels, et qui affectent l'allure des voltammogrammes suite à une adsorption irréversible [24], est extrêmement importante dans l'analyse des échantillons environnementaux en l'occurrence les effluents. Plusieurs groupes ont utilisé des agents complexant sur la surface d'une électrode à film mince de mercure afin d'adsorber le plomb (II), le cadmium (II) [25] et le chrome (IV) dans des effluents naturels [26]. Wang et ses collaborateurs [27] [29][30][31][32][33][34].…”

Section: Introductionunclassified

Applications analytiques des films minces de mercure protégés par du fibrinogène pour la détermination du plomb et du cadmium dans des échantillons d’eaux usées et d’eaux de mer

Imane¹,

Mama²,

Aziz³

et al. 2010

Afrique Science: Revue Internationale Des Sciences Et Technologie

View full text Add to dashboard Cite

RésuméL'objectif de ce travail est le développement d'un capteur électrochimique à base d'un film mince de mercure protégé par du fibrinogène (Fbg). La préparation, l'optimisation, la caractérisation et l'application des électrodes à film mince de mercure modifiées par du fibrinogène sont étudiées. L'électrode de travail est une électrode à pâte de carbone modifiée par simple adsorption du fibrinogène contenu dans une solution aqueuse en quantité adéquate. Le film de mercure est électrodéposé à des potentiels négatifs sur l'électrode modifiée. Les paramètres expérimentaux tels que la concentration du fibrinogène, le temps de déposition et le potentiel de préconcentration sont étudiés. Les performances de cette électrode sont ensuite évaluées pour la détermination simultanée du plomb et du cadmium en présence de différents surfactants tels que la gélatine, l'albumine, le SDS et le Tween 20. Les limites de détection obtenues sont de 5.10 Abstract Analytical application of fibrinogen-coated mercury film electrodes for the detection of lead and cadmium in water samplesThe aim of this study was the development of sensor based on fibrinogen (Fbg) coated mercury film electrodes at carbon paste electrode in the perspective of in-field stripping analysis of heavy metals in complex matrix. The preparation, optimization and characterization of coatings of Fibrinogen (Fbg) for the modification of thin mercury film electrodes and its application for the detection of trace metals have been described. The modified carbon paste electrode was prepared by a simple adsorption of fibrinogen from an aqueous solution containing an adequate quantity of fibrinogen. The Mercury film was then prepared by electrodeposition through the fibrinogen coating. The experimental parameters such as concentration of fibrinogen, deposition time and deposition potential were investigated. The performance of this electrode is evaluated in a presence of different surfactants such as gelatine, albumin, SDS and Tween 20, while lead and cadmium were employed as test metal ions. Using selected conditions the limits of detection were 5.10 for lead and cadmium, respectively. Since fibrinogen coated mercury film showed the best performance and increased efficiency against surfactants when comparing to the conventional mercury film, it was used for the analysis of trace metals in environmental samples of waters and industrial effluents.

show abstract

“…reagents for the determination of trace amounts of various metal Hence, utilizing analytical techniques, including ions in water samples. [28][29][30][31][32] On the other hand, 1,4 voltammetry, 8,9 chromatography, 10,11 spectrophotometry, [12][13][14][15][16] and diaminoanthraquinone (1,4-DAAQ) has also been used as a spectrofluorometry [17][18][19] has been successfully developed for the fluorescence quencher 33 and for the synthesis of conducting determinations in different sample matrices. Among them, the organic materials based on either complexation or oxidation last two techniques utilizing Cr(VI)-selective methods are of behaviors.…”

Section: Introductionmentioning

confidence: 99%

Speciation Determination of Chromium Using 1,4-Diaminoanthraquinone with Spectrophotometric and Spectrofluorometric Methods

Hosseini

Asadi

2009

ANAL. SCI.

View full text Add to dashboard Cite

A highly sensitive and selective method has been proposed for speciation determination of trace amounts of Cr(III) and Cr(VI) in water samples using 1,4-diaminoanthraquinone (1,4-DAAQ). The method is based on mixing an organic phase containing 1,4-DAAQ with an acidic solution (pH 1) of Cr(VI), which is accomplished with absorbance decreasing or luminescence quenching of the organic phase due to a partial oxidation of the 1,4-DAAQ content. After oxidation of Cr(III) to Cr(VI) and determining the total chromium content, Cr(III) content is obtained by subtracting. All of the variables were studied in order to optimize the reaction conditions. No considerable interference was observed due to the presence of coexisting anions and cations. The calibration graphs were linear in the range 3.0×10 -7 -3.0×10 -6 and 1.0×10 -7 -4.0×10-6M with detection limits of 3.5×10 -8 and 2.1×10 -9 M for absorptiometry and fluorometry, respectively. Validation of the measurements was confirmed using standard reference materials and a certificated method.

show abstract

Indirect determination of hexavalent chromium ion in complex matrices by adsorptive stripping voltammetry at a mercury electrode

Cited by 29 publications

References 33 publications

Characteristics of Voltammetric Determination and Speciation of Chromium – A Review

Characteristics of Voltammetric Determination and Speciation of Chromium – A Review

Applications analytiques des films minces de mercure protégés par du fibrinogène pour la détermination du plomb et du cadmium dans des échantillons d’eaux usées et d’eaux de mer

Speciation Determination of Chromium Using 1,4-Diaminoanthraquinone with Spectrophotometric and Spectrofluorometric Methods

Contact Info

Product

Resources

About