Analytical implications of zeolites in overlayers at electrodes

Rolison, Debra R.; Nowak, Robert J.; Welsh, Timothy A.; Murray, C.G.

doi:10.1016/0039-9140(91)80006-l

Cited by 80 publications

(28 citation statements)

References 24 publications

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“…In particular, substantial efforts have been devoted to the development of voltammetric biosensors based on ZMEs, such as dopamine or epinephrine [18], glucose [19], and phenols [20] biosensors. Zeolite is an interesting material for applications in electroanalytical chemistry; Rilison [21] and Walcarius [22] have recently published reviews of this area. A complete comprehension for electrochemical behavior produced by electroactive species in zeolite particles can facilitate the development of sensors.…”

Section: Introductionmentioning

confidence: 99%

The Electrochemical Behavior of Iron(III) Incorporated in Zeolite Y-Modified Electrode and the Catalytic Oxidation of Ascorbic Acid

et al. 1999

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A new method is developed for the catalytic oxidation of ascorbic acid (AA) at a graphite-zeolite-modi®ed electrode doped with iron(III) (Fe 3 YaZCME), in which iron(III) exchanged in zeolite Y can act as catalyst to oxidize AA. First, the electrochemical behavior of iron(III) incorporated in the zeolite Y-modi®ed electrode was studied. The results illustrate that diffusion controls the ferricaferrous redox process at the Fe 3 YaZCME. The anodic current of this process increases with the supporting electrolyte concentration of non-size-excluded cation and was suppressed when using size-excluded cation. Second, the catalytic oxidation of AA was explored at Fe 3 YaZCME. With constant potential amperometric measurements optimal conditions for AA determination were obtained. The working potential was 0.55 V (vs. SCE); the supporting electrolyte was 0.1 M KNO 3 or 0.05 M Na 2 HPO 4 -KH 2 PO 4 buffer solution (pH 6.8). The response current exhibits a linear relationship with the concentration of AA over the range of 1.58610 À6 ±2.15610 À2 M. When samples of urine, and fruit were analyzed with Fe 3 YaZCME, we obtained AA recovery of 98±102%, and a relative standard deviation lower than 3%. Meanwhile, interferences from other ions and organic substances were examined.

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Section: Introductionmentioning

confidence: 99%

The Electrochemical Behavior of Iron(III) Incorporated in Zeolite Y-Modified Electrode and the Catalytic Oxidation of Ascorbic Acid

et al. 1999

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“…Small volume samples (a few microliters) are sufficient for BIA or FIA experiments and multiple analysis (of the same sample or others) does not require the electrode surface to be polished or to be regenerated after eaclh measurement, as was the case for previous electroanalytical uses of zeolitemodified electrodes [8,15,16,251. Since the response time of ZMCPE is rapid, this electrode can be used in both BIA and FIA as a very practical tool for automated analysis.…”

Section: Injection Of Analyte Samplesmentioning

confidence: 99%

Cation determination in aqueous solution using the methyl viologen‐doped zeolite‐modified carbon paste electrode

Walcarius¹,

Lumberts²,

Derouane³

1995

Electroanalysis

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Methyl viologen (MV") initially exchanged in a zeolite Y modified carbon paste electrode (ZMCPE) is reduced after being exchanged for the supporting electrolyte cation. The use of an electrolyte cation that cannot enter zeolite channels to a great extent does not give rise to appreciable currents while a non-size-excluded cation allows liberating MV2+ from zeolite particles and their subsequent reduction at the electrode-solution interface. Following those observations, the MV2+-based ZMCPE has been used for the constant potential (-0.85 V) amperometric detection of nonreducible:, non-size-excluded cations in aqueous medium. The performance of this electrode was investigated in both batch injection analysis (BIA) and flow injection analysis (FIA). The great advantage of BIA coupled to the amperometric detection is the ability to use electrolyte-free sample solutions. For FIA experiments, dissolved oxygen was eliminated by using an electrochemical scrubber containing porous carbon electrodes. With the MV*+-doped ZMCPE, alkali and alkali-metal cations can be detected at the submillimolar level for both batch and flow injection analysis.

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“…The aluminosilicate zeolites, when incorporated into an electrochemical interphase, offer a number of chemical, physical and structural characteristics of high interest in the design of electroanalytical systems: shape, size and charge selectivities, physical and chemical stabilities, high ion-exchange capacity and hydrophilic character [2][3][4][5]. These characteristics are very useful in using zeolites as matrix for immobilization of species able to mediate the electron transfer processes for amperometric detection of H 2 O 2 [6,7] and NADH [8].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behavior of carbon paste electrodes modified with methylene green immobilized on two different X type zeolites

et al. 2006

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Two new modified carbon paste electrodes (CPEs) based on two different X type zeolites, a natural zeolitic volcanic tuff (NZ) and a NaX type synthetic zeolite (SZ), modified with methylene green (MG) were developed. Cyclic voltammetry measurements revealed a reasonably fast electron transfer rate and a good stability for both investigated electrodes. The observed differences between the electrochemical behavior of MG-NZ-CPEs and MG-SZCPEs (the effect of pH on the formal standard potential, the magnitude of the rate constants for heterogeneous electron transfer and electrode response decay) were explained in terms of zeolites structure. The modified electrodes showed moderate electrocatalytic effect towards H 2 O 2 reduction and a relatively low limit of detection (0.5 mM for MG-NZ-CPEs).

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Analytical implications of zeolites in overlayers at electrodes

Cited by 80 publications

References 24 publications

The Electrochemical Behavior of Iron(III) Incorporated in Zeolite Y-Modified Electrode and the Catalytic Oxidation of Ascorbic Acid

The Electrochemical Behavior of Iron(III) Incorporated in Zeolite Y-Modified Electrode and the Catalytic Oxidation of Ascorbic Acid

Cation determination in aqueous solution using the methyl viologen‐doped zeolite‐modified carbon paste electrode

Electrochemical behavior of carbon paste electrodes modified with methylene green immobilized on two different X type zeolites

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