Electrochemical evaluation of polysiloxane-immobilized amine ligands for the accumulation of copper(II) species

Walcarius, Alain; Lüthi, N; Blin, Jean-Luc; Su, Bao‐Lian; Lamberts, L.

doi:10.1016/s0013-4686(99)00181-4

Cited by 79 publications

(36 citation statements)

References 81 publications

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“…But at pH values above 4.4, the current decreased, which might be caused by the formation of metal hydroxide complexes that may be partially soluble. These hydroxide complexes may precipitate either on the wall of the electrolytic cell or on the electrode surface, thereby causing a significant decrease in the quantity of solution phase metal ions that may reach the electrode surface [51]. Therefore, a moderately acidic environment is important for the detection of the divalent heavy metal Cd 2þ .…”

Section: Effect Of Ph Value Of the Buffer Solutionmentioning

confidence: 99%

Fabrication and Characterization of Carbon Nanotube‐Hydroxyapatite Nanocomposite: Application to Anodic Stripping Voltammetric Determination of Cadmium

et al. 2009

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A novel chemically modified electrode for stripping determination of cadmium is presented in this paper, based on carbon nanotube-hydroxyapatite (CNT-HAP) nanocomposite, which can be prepared by an easy and effective onestep sonication. The newly synthesized nanocomposite was characterized with FTIR, TEM, and electrochemical methods. Due to the combination of the strong absorption ability of HAP and excellent electroanalytical properties of CNTs, the GC/CNT-HAP electrode has been successfully used for determination of Cd 2þ by anodic stripping voltammetry with a linear range of 20 nM -3 mM. The sensitivity and detection limit are 25.6 mA/mM and 4 nM, respectively. The practical application of the proposed electrode has been carried out for the determination of trace levels of Cd 2þ in real water samples.

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Section: Effect Of Ph Value Of the Buffer Solutionmentioning

confidence: 99%

Fabrication and Characterization of Carbon Nanotube‐Hydroxyapatite Nanocomposite: Application to Anodic Stripping Voltammetric Determination of Cadmium

et al. 2009

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“…They include polymers displaying complexation centers [7 ± 9] or ion exchange properties [10,11], clays [12 ± 14], zeolites [15,16], silicas [17 ± 19] or organically modified silicas [20,21], and various chelating reagents [22 ± 28]. A great majority of these modifiers were introduced into carbon paste, which constitutes a matrix of choice to prepare electrodes chemically modified with any as-synthesized material [5], while some attempts to immobilize the reactants directly on the surface of solid electrodes were also described.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Copper(II) at an Electrode Modified by a Carnosine–Silica Hybrid Material

et al. 2003

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A new solid-phase extractant based on carnosine moieties covalently attached to a silica backbone (S-Car) was introduced into a carbon paste electrode (CPE), and the resulting modified electrode (S-Car-MCPE) was applied to the preconcentration and subsequent voltammetric quantification of copper(II). The electrode modifier was a solid organic-inorganic hybrid prepared by co-condensation of tetraethoxysilane with an organotri-ethoxysilane containing a carnosine dipeptide (b-alanyl-l-histidine) derivative. This hybrid material has propensity for binding Cu II species from aqueous solutions. The basic voltammetric characterization of S-Car-MCPE, previously loaded with Cu II , indicates clearly that its electrochemical activity requires desorption of the analyte out of the solid material prior to undergoing charge transfer. A two-step analytical procedure was then applied, involving the sequence ™accumulation at open-circuit ± voltammetric detection by anodic stripping differential pulse voltammetry∫. Both these steps have been optimized with respect to various experimental parameters (electrode composition, pH and composition of both detection and accumulation media, preconcentration time, detection mode, presence of interference). Linear response to copper(II) was found in the 5 Â 10 À8 M to 10 À6 M concentration range, with a detection limit estimated at 4 Â 10 À9 M (0.06 ppb). This new immobilization approach for peptide-based materials on electrode surfaces is promising for further developments of organic-inorganic hybrids in electroanalysis.

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“…The stability of Cd(II)-IIP occurs because of protonation of active groups from Nannochloropsis sp biomass. This can protect bond cutting between functional group and silica matrix [19].…”

Section: Chemical Stabilitymentioning

confidence: 99%

CHEMICAL STABILITY AND ADSORPTION SELECTIVITY ON Cd<sup>2+</sup> IONIC IMPRINTED <i>Nannochloropsis</i> sp MATERIAL WITH SILICA MATRIX FROM TETRAETHYL ORTHOSILICATE

Buhani¹,

Suharso²,

Aprilia³

2012

Indones. J. Chem.

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Keywords: ionic imprinted; Nannochloropsis sp; adsorption selectivity ABSTRAK Stabiltas kimia, kemampuan penggunaan ulang, dan selektivitas adsorpsi material Nannochloropsis sp imprinted ionik Cd 2+ (Cd(II)-IIP) dengan matriks silika dari prekursos tetraetil orthosilikat (TEOS) telah dipelajari melalui serangkaian eksperimen adsorpsi dengan metoda batch. Material Nannochloropsis sp Cd(II)-IIP dikarakterisasi dengan spektrofotometer inframerah (IR) untuk identifikasi gugus fungsi dan analisis kadar logam dengan spektrofotometer serapan atom (AAS). Stabilitas kimia ditentukan dalam media larutan asam, netral dan basa. Selektivitas adsorpsi diketahui dengan menentukan koefisien selektifitas (α) ion 0,887; 20,180; 28,053; 33,417.

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Electrochemical evaluation of polysiloxane-immobilized amine ligands for the accumulation of copper(II) species

Cited by 79 publications

References 81 publications

Fabrication and Characterization of Carbon Nanotube‐Hydroxyapatite Nanocomposite: Application to Anodic Stripping Voltammetric Determination of Cadmium

Fabrication and Characterization of Carbon Nanotube‐Hydroxyapatite Nanocomposite: Application to Anodic Stripping Voltammetric Determination of Cadmium

Electrochemical Detection of Copper(II) at an Electrode Modified by a Carnosine–Silica Hybrid Material

CHEMICAL STABILITY AND ADSORPTION SELECTIVITY ON Cd<sup>2+</sup> IONIC IMPRINTED <i>Nannochloropsis</i> sp MATERIAL WITH SILICA MATRIX FROM TETRAETHYL ORTHOSILICATE

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