Determination of titanium in sea water using catalytic cathodic stripping voltammetry

Yokoi, Kunihiko; Berg, Constant M.G. van den

doi:10.1016/s0003-2670(00)80217-2

Cited by 81 publications

(29 citation statements)

References 17 publications

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“…It was a disadvantage of these methods, as great improvement in the sensitivity of titanium determination can be obtained by coupling the catalytic effect of chlorate ions with AdSV determination. 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: 79%

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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: à5mentioning

confidence: 79%

“…Most probably different Ti-kalces complexes are created in pH 3.0 and 6.0. At pH 3.0 the oxygen atom from the hydroxyl group (in ortho position to the azo linkage) and the oxygen atom from the carboxyl group might take part in the complexation (similarly as for mandelic acid [18]). This is illustrated in Figure 4C.…”

Section: Sulfonazo IIImentioning

confidence: 99%

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

Gawryś

Golimowski

2003

Electroanalysis

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“…Some of these complexes may induce catalytic reactions, which offer an additional increase in the sensitivity. Catalytic-adsorptive systems such as Ti(IV)-ligand-chlorate, in which one of the following substances may act as the ligand: mandelic acid [22,23], pyrocatechol violet [24], Ti(IV)-methylthymol blue [25], xylenol orange and calcein [25], triphenylmethane dyes [26] and kalces [27], are used in the most sensitive methods of Ti(IV) determination and find application in its trace analysis [8].…”

Section: Introductionmentioning

confidence: 99%

Application of the Bismuth Film Electrode for Voltammetric Determination of Titanium Using Ti(IV)‐Oxalate‐Chlorate Catalytic System

et al. 2009

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The catalytic voltammetric protocol for the determination of titanium at a bismuth film electrode is presented. The method is based on the reduction of the Ti(IV)-oxalate complex to Ti(III)-oxalate in an acidic solution. It was proven that the addition of KClO 3 causes rapid oxidation of Ti(III)-oxalate and, subsequently, an increase of the reduction peak current of Ti(IV) at the bismuth film electrode. Parameters that influence the Ti response, including the film preparation, solution pH, oxalate acid and chlorate concentrations, were optimized. The exploitation of the bismuth film electrode under the optimized conditions yielded a stable response for titanium, with high sensitivity (12.5 mA mM À1 ), good precision (RSD ¼ 5.0%) and a low detection limit (1 Â 10 À8 M).

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“…We assigned these differences to matrix effects. Additionally, some authors [19,20,21,22] highlight the great significance of catalytic effects for chlorate ions toward the determination of metals as metal complexes. In the present work, chlorate concentrations ranging from 0.01 to 0.05 mol L À1 were tested without any significant improvement on the analytical signal.…”

mentioning

confidence: 99%

Determination of the Natural Dissolved Concentration of Zirconium in Seawater by Adsorptive Stripping Voltammetry

et al. 2013

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A voltammetric method was developed for zirconium determination as Zr(IV)-cupferron-oxalate-diphenylguanidine complex based on adsorptive accumulation at the HMDE (E peak = À0.95 V). The supporting electrolyte was a mixture of acetate/acetic acid (pH 4.6) and ammonium acetate (pH 5.7) solutions. E ads = À0.6 V (vs. Ag/AgCl), t ads = 400 s, 10 mV s À1 scan rate, and DP mode were the main parameters. The linear range was 0.033 to 3.3 10 À9 mol L À1, and the LOD and LOQ (t ads = 400 s) were 0.77 and 1.6 10 À11 mol L À1, respectively. The method was adequate for seawater samples, although not sufficiently sensitive for surface waters.

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Determination of titanium in sea water using catalytic cathodic stripping voltammetry

Cited by 81 publications

References 17 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

Application of the Bismuth Film Electrode for Voltammetric Determination of Titanium Using Ti(IV)‐Oxalate‐Chlorate Catalytic System

Determination of the Natural Dissolved Concentration of Zirconium in Seawater by Adsorptive Stripping Voltammetry

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