Extremely sensitive germanium stripping voltammetric determination with the use of a new Ge(IV)-catechol-V(IV)-HEDTA catalytic adsorptive system

Zarębski, Jerzy; Bobrowski, Andrzej; Gonciarczyk, Julia; Królicka, Agnieszka

doi:10.1016/j.electacta.2019.134859

Cited by 7 publications

(17 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our previous work had shown that it is possible to amplify the voltammetric signal of germanium complexed by catechol considerably by introducing the V(IV) ⋅ HEDTA complex to the analyzed solution. This provided a rationale for the investigation of other 1,2‐dihydroxybenzenes as complexing agents for germanium(IV) in combination with vanadium complexes such as V(IV) ⋅ NTA, V(IV) ⋅ EDTA, V(IV) ⋅ DHPTA and V(IV) ⋅ HEDTA.…”

Section: Resultsmentioning

confidence: 99%

“…The results presenting the voltammetric characteristics of adsorptive and catalytic adsorptive stripping voltammetric systems employing a complex formed by pyrogallol and germanium in the presence of different vanadium complexonates (Table ) indicate that the V(IV) ⋅ HEDTA complex provides the greatest catalytic amplification (

I_{p}^{C A d S V} / I_{p}^{A d S V}

) – by a factor of 100, which is almost four times higher than the amplification previously reported for the Ge(IV)‐catechol system .…”

Section: Resultsmentioning

confidence: 99%

“…No substantial changes in peak current were observed up to a Triton X‐100 concentration of 0.2 mg dm −3 For higher concentrations, the germanium peak decreased linearly at the rate of 0.096±0.003 μA per 1 mg dm −3 of Triton X‐100. It appears that another advantage of the Ge(IV)‐pyrogallol‐V(IV)‐HEDTA system is that is less sensitive to surface‐active substances than the previously reported complex with catechol, for which the germanium signal retained only 8.3 % of its initial current in the presence of 0.2 mg dm −3 of Triton X‐100 .…”

Section: Resultsmentioning

confidence: 99%

“…Stock solutions of vanadium complexes containing 0.04 M of V(IV) and 0.08 M of a given complexone (NTA (nitrilotriacetic acid), DHPTA (1,3-diamino-2-hydroxypropane-N,N,N,N'-tetraacetic acid), EDTA (ethylenediaminetetraacetic acid, disodium salt) or HEDTA (Nhydroxyethyl-ethylene diamine-triacetic acid)) were prepared by mixing an appropriate volume of a 0.2 M solution of VOSO 4 with an accurately weighed portion of the corresponding solid derivative of tri-or tetraacetic acid. The required pH of 4.5 was obtained by adding the appropriate volume of 30 % NaOH [22].…”

Section: Reagentsmentioning

confidence: 99%

“…CAdSV has recently been applied to determine Ge in the form of its complex with catechol in the presence of a new catalytic agent -V(IV) • HEDTA (HEDTA, N-(2hydroxyethyl)-ethylene diamine N,N',N'-triacetic acid) [22]. The catalytic amplification of Ge response in the presence of V(IV) • HEDTA was found to be much higher than in the presence of other reagents such as bromate or V(IV) • EDTA.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Selection of Optimal Ligand and Vanadium(IV) Complexonate for Sensitive Catalytic Adsorptive Stripping Voltammetric Quantification of Germanium

et al. 2020

Self Cite

View full text Add to dashboard Cite

The study describes the properties of catalytic adsorptive stripping voltammetric (CAdSV) systems based on complexes of Ge(IV) with gallic acid, catechol or pyrogallol as well as vanadium complexes with complexones such as NTA, DHPTA, EDTA, and HED-TA, used as catalytic agents. The most pronounced CAdSV response was observed when the Ge(IV)-pyrogal-lol complex was coupled with V(IV)-HEDTA. In 0.05 M of acetate buffer containing 1 mM of pyrogallol, 2 mM of V(IV) and 4 mM of HEDTA, the peak current of germanium exhibited good linearity for Ge(IV) concentrations over the range from 0.25 nM to 25 nM and a low limit of detection (LOD = 0.02 nM). The method was verified by measuring Ge(IV) in real water samples.

show abstract

Section: Resultsmentioning

confidence: 99%

I_{p}^{C A d S V} / I_{p}^{A d S V}

) – by a factor of 100, which is almost four times higher than the amplification previously reported for the Ge(IV)‐catechol system .…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Reagentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Selection of Optimal Ligand and Vanadium(IV) Complexonate for Sensitive Catalytic Adsorptive Stripping Voltammetric Quantification of Germanium

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

A novel catalytic adsorptive stripping voltammetric method for the determination of germanium ultratraces in the presence of chloranilic acid and the V(IV)·HEDTA complex

Zarębski

Bobrowski

Królicka

et al. 2020

J Solid State Electrochem

View full text Add to dashboard Cite

A novel, sensitive catalytic adsorptive stripping voltammetric procedure which can be used to determine trace amounts of germanium is described. The method is based on the interfacial accumulation of the complex formed by Ge(IV) and the product of the reduction of chloranilic acid on the hanging mercury drop electrode or the renewable silver amalgam film electrode, and its subsequent reduction from the adsorbed state followed by the catalytic action of the V(IV)·HEDTA complex. The presence of V(IV)·HEDTA greatly enhances the adsorptive stripping response of Ge. The reduction of the Ge(IV) in the presence of chloranilic acid and V(IV)·HEDTA was investigated in detail and the effects of pH, electrolyte composition, and instrumental parameters were studied. Under optimal conditions, the catalytic peak current of germanium exhibited good linearity for Ge(IV) concentrations in the range of 0.75–60 nM (for 60 s of accumulation at −0.1 V, r2 = 0.995) and a low limit of detection (LOD = 0.085 nM). The procedure was successfully applied to determine Ge in water samples.

show abstract

Spectrophotometric and DFT study of Germanium(IV) interaction with 6,7-dihydroxy-2,4-diphenyl-1-benzopyran-1-ium bromide in solutions: Room-temperature cloud point extraction and its analytical application

Zhukovetska,

Fizer,

Mariychuk

et al. 2024

Journal of Molecular Liquids

View full text Add to dashboard Cite

Extremely sensitive germanium stripping voltammetric determination with the use of a new Ge(IV)-catechol-V(IV)-HEDTA catalytic adsorptive system

Cited by 7 publications

References 32 publications

Selection of Optimal Ligand and Vanadium(IV) Complexonate for Sensitive Catalytic Adsorptive Stripping Voltammetric Quantification of Germanium

Selection of Optimal Ligand and Vanadium(IV) Complexonate for Sensitive Catalytic Adsorptive Stripping Voltammetric Quantification of Germanium

A novel catalytic adsorptive stripping voltammetric method for the determination of germanium ultratraces in the presence of chloranilic acid and the V(IV)·HEDTA complex

Spectrophotometric and DFT study of Germanium(IV) interaction with 6,7-dihydroxy-2,4-diphenyl-1-benzopyran-1-ium bromide in solutions: Room-temperature cloud point extraction and its analytical application

Contact Info

Product

Resources

About