Sensitive and very selective determination of titanium by adsorptive-catalytic stripping voltammetry with methylthymol blue, xylenol orange and calcein

Gawryś, Marcin; Golimowski, Jerzy

doi:10.1016/s0003-2670(00)01183-1

Cited by 27 publications

(28 citation statements)

References 19 publications

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“…It is clear that kalces method is the method of choice when traces of titanium are going to be determined. However, detection limit obtained with this ligand was higher than with triphenylmethyl compounds described in the previous article [21].…”

Section: Sulfonazo IIImentioning

confidence: 50%

“…This phenomenon was first described by Koryta and Tengyl [17] for oxalate and was followed by other examples of the similar systems: with mandelic acid [18,19], pyrocatechol violet [13] or triphenylmethane dyes [20]. In the previous article the authors have described catalytic systems with triphenylmethyl compounds for titanium determination in the presence of chlorate ions [21].…”

Section: à5mentioning

confidence: 80%

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Novel, Sensitive Voltammetric Methods for Titanium Determination Using Chromotropic Acid and Azo‐Compounds as Complexing Agents

Gawryś

Golimowski

2003

Electroanalysis

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Voltammetric behavior of titanium(IV) complexes with chromotropic acid, its azo-derivatives: 2-(4-sulfophenylazo)-1,8-dihydroxy-3,6-naphthalenedisulfonic acid (SPANDS), chromotrope 2B, sulfonazo III and other azo-compounds: calmagite, tropeoline O and kalces was investigated at a hanging mercury drop electrode. These complexes strongly adsorb onto the electrode, thus can be determined by an adsorptive stripping voltammetry (optimal pH about 6). At pH about 3 reduction current enhancement for Ti-kalces complex was observed in the presence of chlorate ions. It is a rare example of a catalytic process with azo-compound as a complexing agent. Signal for Fe-calmagite complex reduction was also observed. Influence of foreign ions and the optimal conditions for titanium determination are described in detail. Additionally, a connection between obtained results and a structure of titanium complexes is discussed.

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Section: Sulfonazo IIImentioning

confidence: 50%

Section: à5mentioning

confidence: 80%

Novel, Sensitive Voltammetric Methods for Titanium Determination Using Chromotropic Acid and Azo‐Compounds as Complexing Agents

Gawryś

Golimowski

2003

Electroanalysis

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“…The composition of the Ge(IV)-GA complex was determined by the method of Li and Gao [16,17] to be 1 : 1. Using the continuous variations method, the same result was also obtained.…”

Section: Preliminary Experimentsmentioning

confidence: 99%

Catalytic Adsorptive Stripping Voltammetry of Germanium(IV) in the Presence of Gallic Acid and Vanadium(IV)‐EDTA

Chen

Huang

et al. 2007

Electroanalysis

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A highly sensitive and selective catalytic adsorptive cathodic striping procedure for the determination of trace germanium is presented. The method is based on adsorptive accumulation of the Ge(IV)-gallic acid (GA) complex onto a hanging mercury drop electrode, followed by reduction of the adsorbed species. The reduction current is enhanced catalytically by addition of vanadium(IV)-EDTA. The optimal experimental conditions include the use of 0.03 mol/L HClO 4 (pH1.6), 6.0 Â 10 À3 mol/L GA, 3.0 Â 10 À3 mol/L V(IV), 4.0 Â 10 À3 mol/L EDTA, an accumulation potential of À 0.10 V(vs. Ag/AgCl), an accumulation time of 120 s and a differential pulse potential scan mode. The peak current is proportional to the concentration of Ge(IV) over the range of 3.0 Â 10 À11 to 1.0 Â 10 À8 mol/L and the detection limit is 2 Â 10 À11 mol/L for a 120 s adsorption time. The relative standard deviation at 5.0 Â 10 À10 mol/L level is 3.1%. No serious interferences were found. The method was applied to the determination of germanium in ore, mineral water and vegetable samples with satisfactory results.

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“…The detection limit is lowered by increasing the concentration of the analyte adsorbed on the working electrode surface electrodes [20][21][22][23] . Several ligands have been used for the determination of trace metals simultaneously is 8-quinolinol 26 , xylinol orange 24 , calcon 7,9 , and alizarin [15][16] The use calcein as a complexing agent in AdSV ever done for titanium 24 , aluminum and gallium 22 . In this study, we have examined the application of calcein to determine of Cd(II), Cu(II), Pb(II) and Zn(II) by AdSV on a hanging mercury drop electrode (HMDE).…”

Section: Introductionmentioning

confidence: 99%

ADSORPTIVE STRIPPING VOLTAMMETRIC METHODFOR THE INDIVIDUAL DETERMINATION OFCd(II), Cu(II), Pb(II), AND Zn(II) IN VEGETABLESAMPLES USING CALCEIN

2017

Rasayan J Chem

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Adsorptive stripping voltametric method is presented for the individual determination of Cd(II), Cu(II), Pb(II) and Zn(II) in vegetable samples using calcein as a complexing agent. The purpose of this study was to obtain the optimum condition of each metal ions. The optimized experimental conditions include: concentration of 0.2 mM calcein for Cu(II) and Cd(II), 0.6 mM for Zn(II), and 0.7 mM for Pb(II); pH 6 for Cd(II) and Zn(II), pH 7 for Cu(II) and Pb (

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Sensitive and very selective determination of titanium by adsorptive-catalytic stripping voltammetry with methylthymol blue, xylenol orange and calcein

Cited by 27 publications

References 19 publications

Novel, Sensitive Voltammetric Methods for Titanium Determination Using Chromotropic Acid and Azo‐Compounds as Complexing Agents

Novel, Sensitive Voltammetric Methods for Titanium Determination Using Chromotropic Acid and Azo‐Compounds as Complexing Agents

Catalytic Adsorptive Stripping Voltammetry of Germanium(IV) in the Presence of Gallic Acid and Vanadium(IV)‐EDTA

ADSORPTIVE STRIPPING VOLTAMMETRIC METHODFOR THE INDIVIDUAL DETERMINATION OFCd(II), Cu(II), Pb(II), AND Zn(II) IN VEGETABLESAMPLES USING CALCEIN

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