A Novel Nitrite Amperometric Sensor and Its Application in Food Analysis

Yang, Chao; Lü, Qing; Hu, Shengshui

doi:10.1002/elan.200603646

Cited by 50 publications

(33 citation statements)

References 31 publications

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“…4c) the phase angles were 65 • for EPPGE-SWCNT-Co compared with the EPPGE-SWCNT-CoO (51 • ) and EPPGE-SWCNT (48 • ), which are less than the 90 • expected of an ideal capacitive behaviour confirming the presence of CPE and pseudocapacitive nature of these electrodes. pH, the nitrite ion disproportionate to produce the neutral nitric oxide (NO) [49], which has a very short life time especially in an air saturated condition. Thus, the solution under the acidic pH was prepared fresh, with nitrogen purged, de-aerated phosphate buffer solution before analysis.…”

Section: Comparative Electron Transport Propertiesmentioning

confidence: 99%

“…The ions can interact with amines to form carcinogenic nitrosamines [48]. Oxidation of nitrite on bare electrode has been reported to be accompanied with a high over potential [49]. The use of chemically modified electrodes (CMEs) has been developed to decrease the overpotential for nitrite oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…The ET property was investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Since nitrite exists mainly as nitric oxide in acidic medium [49], the electrocatalytic oxidation of nitrite at acidic (pH 3.0) and physiological pH (pH 7.4) was also examined.…”

Section: Introductionmentioning

confidence: 99%

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Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

Adekunle

Pillay

Ozoemena

2010

Electrochimica Acta

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a b s t r a c tThe electrochemical decoration of edge plane pyrolytic graphite electrode (EPPGE) with cobalt and cobalt oxide nanoparticles integrated with and without single-walled carbon nanotubes (SWCNTs) is described. Successful modification of the electrodes was confirmed by field emission scanning electron microscopy (FESEM), AFM and EDX techniques. The electron transfer behaviour of the modified electrodes was investigated in [Fe(CN)6] 3−/4− redox probe using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) and discussed. The study showed that cobalt nanoparticles modified electrodes exhibit faster electron transfer behaviour than their oxides. The catalytic rate constant (K) obtained at the EPPGE-SWCNT-Co for nitrite at pH 7.4 and 3.0 are approximately the same (∼3 × 10 4 cm 3 mol −1 s −1 ) while the limits of detection (LoD = 3.3ı/m) are in the M order. From the adsorption stripping voltammetry, the electrochemical adsorption equilibrium constantˇwas estimated as (13.0 ± 0.1) × 10 3 M −1 at pH 7.4 and (56.7 ± 0.1) × 10 3 M −1 at pH 3.0 while the free energy change ( G • ) due to the adsorption was estimated as −6.36 and −10.00 kJ mol −1 for nitrite at pH 7.4 and 3.0, respectively.

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Section: Comparative Electron Transport Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

Adekunle

Pillay

Ozoemena

2010

Electrochimica Acta

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“…8 The surplus of nitrite would cause carcinogens because it is an essential precursor in the formation of Nnitrosamines. 9,10 So, when nitrites are present at high concentration in blood, they react with the iron(III) of the hemoglobin, forming met hemoglobin, which has no oxygen carrying ability; this disease is called blue baby syndrome. 11,12 Therefore, development a credible and sensitive sensor to detect nitrite in food, drinking water and environmental samples has received continued attention over the past 10 years.…”

Section: Introductionmentioning

confidence: 99%

A Simple and Efficient Electrochemical Sensor for Electrocatalytic Reduction of Nitrite Based on Poly(4‐aminoacetanilide) Film Using Carbon Paste Electrode

Ojani

Raoof

Rahemi

2011

J Chinese Chemical Soc

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In this study, the electrochemical reduction of nitrite was investigated on poly(4-aminoacetanilide) (PPAA) forming by cyclic voltammetry at the surface of carbon paste electrode. The electrochemical properties of the modified electrode have been studied by cyclic voltammetry and double potential step chronoamperometry. Results showed that in the optimum condition (pH = 0.00) the reduction of nitrite occurred at a potential about 667 mV more positive than that unmodified carbon paste electrode. This amount of electrocatalytic ability is high compared with other electrocatalysts. Using a chronoamperometric method, the catalytic rate constant (k) was calculated 8.4 × 10 4 cm 3 mol -1 s -1 . Also, the electrocatalytic reduction peak currents was found to be linear with the nitrite concentration in the ranges of 5 × 10 -4 M to 2.5 × 10 -2 M and 2 × 10 -5 M to 7 × 10 -3 M with detection limits (2s) were determined as 4.5 × 10 -4 M and 1 × 10 -5 M by cyclic voltammetry (CV) and hydrodynamic amperometry methods respectively. Recovery experiments exhibit the satisfactory results.

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“…90 The resulting sensor was used to measure nitrite in food products. By reducing the potential required to measure nitrite, the PBCB modification increased the selectivity over common ionic interferences and cholesterol.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Sensors

2013

Encyclopedia of Biophysics

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This review covers publications related to electrochemical sensors that appeared in print during the years 2006 and 2007. The focus of the review is on the development of electrochemical sensing principles including potentiometric and chronopotentiometric sensors, reference electrodes, voltammetric sensors, and electrochemical biosensors.References were collected by searching electrochemical sensor-related work using ACS SciFinder and ISI Science Citation Index. In addition, the tables of contents of several analytical journals were reviewed manually to identify relevant articles. Only original and review articles written in English were considered. Patents, book chapters or book series, and conference proceedings or abstracts were not considered for this review. The number of references was limited to 200 and as a result only a fraction of relevant work is covered. Specifically, the review was written to focus on fundamental aspects of electrochemical sensor research emphasizing new chemical concepts and not simply the application of electrochemical sensors. On the basis of these guidelines, several hybrid systems whereby electrochemical detection schemes were combined with a separation technique such as microdialysis, electrophoresis, chromatography, and lab-on-a-chip were not included in this review.We ask that our readers note that our review is not a comprehensive coverage of the above topics, but rather a snapshot of research conducted over the past two years. Obviously, electrochemical sensor research is still expanding and of interest to a number of disciplines beyond traditional chemistry. As such, it was not possible to cover all manuscripts published. We apologize to the authors of manuscripts that were not included in this review. POTENTIOMETRIC SENSORS ReviewsBakker and Pretsch published a broad review on modern potentiometry describing techniques for improving sensor performance, miniaturizing sensor platforms, and expanding the application of potentiometric sensors for environmental trace analysis and biosensing (98 citations). 1 Likewise, Pretsch provided a general overview on ion-selective electrodes (ISEs) focusing on improving detection limits and understanding non-classical (i.e., non-equilibrium) potentiometry for monitoring clinical relevant polyions such as heparin and protamine (81 citations). 2 De Marco et al. reviewed ISE methodologies for the analysis of trace metals and anions (e.g., F − , CN − , NO 3 − , NO 2 − , and Cl − ) in environmental samples. 3

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A Novel Nitrite Amperometric Sensor and Its Application in Food Analysis

Cited by 50 publications

References 31 publications

Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

A Simple and Efficient Electrochemical Sensor for Electrocatalytic Reduction of Nitrite Based on Poly(4‐aminoacetanilide) Film Using Carbon Paste Electrode

Electrochemical Sensors

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