Morphological variation at the [NiFe(CN)6]2-/- derivatized nickel electrode:  A technique for the evaluation of alkali cation containing solutions

Amos, Linda J.; Duggal, Anil R.; Mirsky, Eric J.; Ragonesi, Peter; Bocarsly, Andrew Bruce; Fitzgerald‐Bocarsly, Patricia

doi:10.1021/ac00154a012

Cited by 83 publications

(45 citation statements)

References 11 publications

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“…Analytical application of a cupric hexacyanoferrate electrode was reported by Thomsen and Baldwin [11], while Amos et al [12] used nickel hexacyanoferrate as a working electrode for electrochemical detection of cesium ion in concentrations as low as 10 nM in the presence of 1 M NaNO 3 .…”

Section: Introductionmentioning

confidence: 99%

Urea determination in FIA mode by a newly designed urease-based biosensor

Milardovi

Kruhak

Grabari

1999

Lab. Robotics Autom.

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Section: Introductionmentioning

confidence: 99%

Urea determination in FIA mode by a newly designed urease-based biosensor

Milardovi

Kruhak

Grabari

1999

Lab. Robotics Autom.

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“…The influence of Cs þ is evident: the peak area decreased. The CV transformation is not new; it is usually observed in voltammetric studies on NiHCFe films and cesium solutions [14,19,20]. Amos and co-workers [20] suggested that the area and shape modification of the NiHCFe voltammetric wave in cesium solutions is promoted by the alkaline ion, which partially deactivate the electroactive surface species.…”

mentioning

confidence: 99%

“…The CV transformation is not new; it is usually observed in voltammetric studies on NiHCFe films and cesium solutions [14,19,20]. Amos and co-workers [20] suggested that the area and shape modification of the NiHCFe voltammetric wave in cesium solutions is promoted by the alkaline ion, which partially deactivate the electroactive surface species. It is possible that the modification of the wave observed on a NiHCFe-Al 2 O 3 /GC electrode may be due to a similar process, i.e., a partial deactivation of the active sites promoted by the cesium ions.…”

mentioning

confidence: 99%

“…The linear equation can be written as [20], DQ ¼ m log j Cs þ jþ b, where DQ is the difference between the cathodic peak area of the blank (Q b ) and the cathodic peak area when the metal ion is present (Q M ); m and b are the slope and intercept of the curve, respectively. The background was the signal obtained from a NiHCFeAl 2 O 3 /GC electrode free of cesium in 0.1 mol L À1 of KNO 3 solution.…”

mentioning

confidence: 99%

“…According to the literature information the electroanalytical methods proposed for cesium quantification have, by far, a higher LOD or quantification limit. For instance, electrodes modified with polymeric structures incorporating zeolites [21] or ethylene glycol [22], electrodes coated with calix crown ionophores [23 -26], or even those based on hexacyanoferrate films, such as Prussian blue [27] or nickel hexacyanoferrate on nickel electrodes [20], reported LODs between 10 À5 and 10 À8 mol L…”

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Determination of Cesium on Nickel Hexacyanoferrate‐Aluminum Oxide Modified Electrodes

2009

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This report investigates the electrochemical behavior of hexacyanoferrate casted on Ni-Al 2 O 3 modified electrodes and the preconcentration and detection of cesium ions on such films. It also studies the morphology and the composition of these surfaces. The film was grown on a glassy carbon (GC) surface. Five consecutive voltammetric cycles applied within 0.0 V and À 1.6 V at a scan rate of 10 mV/s were enough to cast the film. Scanning electron microscopy (SEM) analyses showed a homogeneous, porous but broken surface of the film. Its composition was studied by X-ray diffraction (XRD). The presence of NiHCFe was confirmed by Fourier transformed infrared spectroscopy (FT-IR). The Cs þ preconcentration from diluted solutions was accomplished in 90 s, under a negative potential of À 0.20 V applied to the modified working electrode. The detection of cesium has a good sensitivity and a wide linear interval (10 À8 and 10 À12 mol L À1). Even so, the limit of detection calculated was extremely low (2 Â 10 À16 mol L À1), cesium concentrations lower than 10 À12 mol L À1 gave signals with no analytical significance. However, to our knowledge, this is the lowest level of cesium ever detected by an electroanalytical technique.

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Electroless Preparation and Electrochemistry of Nickel-Pentacyanonitrosylferrate Film Modified Aluminum Electrode

Pournaghi-Azar

Razmi-Nerbin

2000

Electroanalysis

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The use of aluminum substrate as an electrode and the modi®cation of its surface by means of the thin ®lm of nickel pentacyanonitrosylferrate (NiPCNF) was developed. The modi®cation conditions of aluminum surface including the electroless deposition of metallic nickel on the electrode surface from NiCl 2 NH 4 Cl solution and chemical derivatization of deposited nickel to NiPCNF ®lm in solution of 10 mM sodium pentacyanonitrosylferrate (PCNF) 0.5 M NaNO 3 0.03 M HNO 3 are described. The modi®ed Al electrode prepared under optimum conditions, shows a well-de®ned redox couple due to [Ni II Fe III/II (CN) 5 NO] 0/71 system. The effect of pH and radius of the hydrated alkali-metal cation of supporting electrolyte on the electrochemical characteristics of the modi®ed electrode were studied in detail. Diffusion coef®cients of alkali-metal cations in the ®lm (D),transfer rate constant for electron (k s ) and transfer coef®cient (a) were calculated. The electrocatalytic activity of the modi®ed electrode on the oxidation of hydrogen peroxide and ascorbic acid was demonstrated as a typical example of applications.

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Morphological variation at the [NiFe(CN)6]2-/- derivatized nickel electrode: A technique for the evaluation of alkali cation containing solutions

Cited by 83 publications

References 11 publications

Urea determination in FIA mode by a newly designed urease-based biosensor

Urea determination in FIA mode by a newly designed urease-based biosensor

Determination of Cesium on Nickel Hexacyanoferrate‐Aluminum Oxide Modified Electrodes

Electroless Preparation and Electrochemistry of Nickel-Pentacyanonitrosylferrate Film Modified Aluminum Electrode

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