Electrochemical determination of nitrite based on poly(amidoamine) dendrimer-modified carbon nanotubes for nitrite oxidation

Zhu, Ning; Xu, Qin; Li, Sini; Gao, Huan

doi:10.1016/j.elecom.2009.10.018

Cited by 80 publications

(27 citation statements)

References 27 publications

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“…As shown in , r = 0.999). The detection limit (S/N = 3) for nitrite is 2.00 × 10 −6 M. The linear dynamic range and detection limit obtained at the present poly(methylene blue)-modified GC electrode without the incorporation of nanostructured materials are clearly comparable to those reported in the literature, [7][8][9][10][11][12][13][14] which is a distinctive advantage of the present method.…”

Section: Resultssupporting

confidence: 80%

“…Many methods such as spectrophotometry, 3,4 chromatography, 5,6 and electrochemical sensors, [7][8][9][10][11][12][13][14][15][16] have been developed for nitrite determination. Among those methods, electrochemical methods are most favorable in terms of simplicity, speed, and cost effectiveness.…”

mentioning

confidence: 99%

“…Therefore, chemical modifications of electrode surface have been widely tried in order to decrease the overpotential and increase the sensitivity for the nitrite oxidation. Among the various modification methods, chemically modified electrodes based on metal complex, 7-9 functionalized electropolymerized films 10 or composite films containing carbon nanotubes [11][12][13][14] are most widely studied. Although aforementioned methods for the preparation of chemically modified electrodes are effective, new fabrication schemes providing improved sensitivity, selectivity and long-term stability are highly desired to broaden the application of electrochemical nitrite sensors in analytical sciences.…”

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confidence: 99%

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Amperometric Determination of Nitrite at Poly(Methylene Blue)-Modified Glassy Carbon Electrode

et al. 2012

Bulletin of the Korean Chemical Society

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Electrochemical characteristics of nitrite ion were investigated at a poly(methylene blue)-modified glassy carbon electrode by cyclic voltammetry and differential pulse voltammetry. The poly(methylene blue)-modified glassy carbon electrode exhibited enhanced anodic signals for nitrite. The effects of key parameters on the detection of nitrite were evaluated at the modified electrode, such as pH, accumulation time, and scan rate. Under optimum condition, the chemically modified electrode can detect nitrite in the concentration range 2.0 × 10 −6 to 5.0 × 10 −4 M with the detection limit of 2.0 × 10 −6 M and a correlation coefficient of 0.999. The detection of nitrite using the chemically modified electrode was not affected by common ions such as Na2− and H 2 PO 4 − . The modified electrode showed good stability and reproducibility. The practical application of the present method was successfully applied to the determination of nitrite ion in cabbage samples.

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Section: Resultssupporting

confidence: 80%

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confidence: 99%

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confidence: 99%

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Amperometric Determination of Nitrite at Poly(Methylene Blue)-Modified Glassy Carbon Electrode

et al. 2012

Bulletin of the Korean Chemical Society

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“…Because reduction of nitrite usually suffers from disadvantages of known interferences from nitrate and molecular oxygen [17], oxidation of nitrite is preferred. Various electrode substrates have been reported, including for instance, Au-Fe(III) nanoparticles [18], Au nanoparticles on choline chloride modified glassy carbon [19], poly(amidoamine) dendrimer-modified carbon nanotubes [20], cytochrome on multi-walled carbon nanotubes-PAMAM-chitosan nanocomposite modified glass carbon [21] and carbon nanotube/polyvanillin composite film [22].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Gold Leaf for Amperometric Determination of Nitrite

Wang

Liu

et al. 2010

Electroanalysis

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Ultra-thin free-standing nanoporous gold leaf made by dealloying exhibits excellent electrocatalytic activities toward nitrite oxidation. The electrochemical responses of nitrite ions on this novel nano-electrode is found not dependent on pH over a wide range from 4.5 to 8.0, which is markedly different from that of gold oxidation, a process known to be highly pH-sensitive. Amperometric study shows a linear relationship for nitrite determination in a concentration range from 1 mM to 1 mM. This nanostructured gold electrode displays good stability, repeatability and selectivity which suggests its potential for the development of new electrochemical sensors.

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“…The resulting electrode is then covered with a plastic cap and kept for 6 h at room temperature to obtain a polymer-CNT modified electrode (Zhu et al, 2009). CNTs can also be modified by polymer−metallic nanoparticles (Fig.…”

Section: Binding Of Cnts With Polymermentioning

confidence: 99%

Advances in carbon nanotube based electrochemical sensors for bioanalytical applications

Vashist

Zheng

Al‐Rubeaan

et al. 2011

Biotechnology Advances

407

218

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Electrochemical (EC) sensing approaches have exploited the use of carbon nanotubes (CNTs) as electrode materials owing to their unique structures and properties to provide strong electrocatalytic activity with minimal surface fouling. Nanofabrication and device integration technologies have emerged along with significant advances in the synthesis, purification, conjugation and biofunctionalization of CNTs. Such combined efforts have contributed towards the rapid development of CNT-based sensors for a plethora of important analytes with improved detection sensitivity and selectivity. The use of CNTs opens an opportunity for the direct electron transfer between the enzyme and the active electrode area. Of particular interest are also excellent electrocatalytic activities of CNTs on the redox reaction of hydrogen peroxide and nicotinamide adenine dinucleotide, two major by-products of enzymatic reactions. This excellent electrocatalysis holds a promising future for the simple design and implementation of on-site biosensors for oxidases and dehydrogenases with enhanced selectivity. To date, the use of an anti-interference layer or an artificial electron mediator is critically needed to circumvent unwanted endogenous electroactive species. Such interfering species are effectively suppressed by using CNT based electrodes since the oxidation of NADH, thiols, hydrogen peroxide, etc. by CNTs can be performed at low potentials. Nevertheless, the major future challenges for the development of CNT-EC sensors include miniaturization, optimization and simplification of the procedure for fabricating CNT based electrodes with minimal non-specific binding, high sensitivity and rapid response followed by their extensive validation using "real world" samples. A high resistance to electrode fouling and selectivity are the two key pending issues for the application of CNT-based biosensors in clinical chemistry, food quality and control, waste water treatment and bioprocessing.

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Electrochemical determination of nitrite based on poly(amidoamine) dendrimer-modified carbon nanotubes for nitrite oxidation

Cited by 80 publications

References 27 publications

Amperometric Determination of Nitrite at Poly(Methylene Blue)-Modified Glassy Carbon Electrode

Amperometric Determination of Nitrite at Poly(Methylene Blue)-Modified Glassy Carbon Electrode

Nanoporous Gold Leaf for Amperometric Determination of Nitrite

Advances in carbon nanotube based electrochemical sensors for bioanalytical applications

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