Electrocatalytic activity of thianthrene toward one-electron oxidation of guanosine and DNA in a non-aqueous medium

Mehrgardi, Masoud A.; Barfidokht, Abbas

doi:10.1016/j.jelechem.2010.03.028

Cited by 3 publications

(3 citation statements)

References 49 publications

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“…Many factors have led to their popularity: low ohmic resistance, large potential window, and ease of modification, to name a few. A quick review of recent literature indicates that CP or modified carbon paste (MCP) electrodes are applicable to aqueous , and nonaqueous , matrices in determination of organic , and inorganic , elements and compounds.…”

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confidence: 99%

Preconcentration of f-Elements from Aqueous Solution Utilizing a Modified Carbon Paste Electrode

et al. 2011

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An evaluation using paraffin oil based, Acheson 38 carbon paste electrodes modified with α-hydroxyisobutyric acid (HIBA) to preconcentrate f-elements cathodically is described. The modified paste was made by directly mixing solid HIBA into the carbon paste. A chemically reversible cyclic voltammogram for HIBA was observed on this modified carbon paste, which was found to be a non-Nerstian, single electron transfer process. Lanthanides (less promethium) were found to accumulate onto the electrode surface during a 30 s electrodeposition step at -0.4 V vs Ag/AgCl from 0.1 M LiCl. The elements were then stripped off into a 2% HNO(3) solution by an oxidative step at +0.8 V vs Ag/AgCl; quantitative removal from the electrode was confirmed by ICPMS. Ultratrace solutions with initial concentrations down to 5 parts per quadrillion (ppq) were preconcentrated in 5 min above our instrumental limit of detection (LOD) of around 1 ppt for lanthanides.

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confidence: 99%

Preconcentration of f-Elements from Aqueous Solution Utilizing a Modified Carbon Paste Electrode

et al. 2011

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“…The first biosensing applications of aptamers were introduced in 1996 where optical biosensors based on fluorescently labeled aptamers were developed [11]. However, the integration of aptamer characteristics with those of electrochemical systems [12] that include enhanced sensitivity [13] and selectivity [14][15][16], reconcilable with unique microfabrication techniques [17,18] and capable of integrating nanomaterials [19][20][21][22][23][24][25], inherent miniaturization [26], low cost, disposability [27], low power requirements [28,29], independence of sample turbidity, and point-of-care applications [30][31][32] have made electrochemical aptasensors [33][34][35][36] a terrific candidate for many sensing applications. For the first time in 2004 [37], an aptasensor was introduced.…”

Section: Introductionmentioning

confidence: 99%

Application of Electrochemical Aptasensors toward Clinical Diagnostics, Food, and Environmental Monitoring: Review

Mohamed

Mohan

et al. 2019

Sensors

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Aptamers are synthetic bio-receptors of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) origin selected by the systematic evolution of ligands (SELEX) process that bind a broad range of target analytes with high affinity and specificity. So far, electrochemical biosensors have come up as a simple and sensitive method to utilize aptamers as a bio-recognition element. Numerous aptamer based sensors have been developed for clinical diagnostics, food, and environmental monitoring and several other applications are under development. Aptasensors are capable of extending the limits of current analytical techniques in clinical diagnostics, food, and environmental sample analysis. However, the potential applications of aptamer based electrochemical biosensors are unlimited; current applications are observed in the areas of food toxins, clinical biomarkers, and pesticide detection. This review attempts to enumerate the most representative examples of research progress in aptamer based electrochemical biosensing principles that have been developed in recent years. Additionally, this account will discuss various current developments on aptamer-based sensors toward heavy metal detection, for various cardiac biomarkers, antibiotics detection, and also on how the aptamers can be deployed to couple with antibody-based assays as a hybrid sensing platform. Aptamers can be used in various applications, however, this account will focus on the recent advancements made toward food, environmental, and clinical diagnostic application. This review paper compares various electrochemical aptamer based sensor detection strategies that have been applied so far and used as a state of the art. As illustrated in the literature, aptamers have been utilized extensively for environmental, cancer biomarker, biomedical application, and antibiotic detection and thus have been extensively discussed in this article.

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“…Furthermore, biosensors also offer the possibility of rapid and on-site monitoring, thus providing real-time information in the production process [ 10 ]. Among the various reported biosensors, electrochemical biosensors have been very popular and widely used due to their well-understood bio-interaction and detection process [ 11 , 12 , 13 , 14 ]. Need of highly sensitive, specific, and rapid analysis, alongside accuracy in analytical measurements has developed significant scope for the development of electrochemical biosensors as a novel detection tool for food commodity [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Food Safety Analysis Using Electrochemical Biosensors

Mishra

Barfidokht

Tehrani

et al. 2018

Foods

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155

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Rapid and precise analytical tools are essential for monitoring food safety and screening of any undesirable contaminants, allergens, or pathogens, which may cause significant health risks upon consumption. Substantial developments in analytical techniques have empowered the analyses and quantitation of these contaminants. However, conventional techniques are limited by delayed analysis times, expensive and laborious sample preparation, and the necessity for highly-trained workers. Therefore, prompt advances in electrochemical biosensors have supported significant gains in quantitative detection and screening of food contaminants and showed incredible potential as a means of defying such limitations. Apart from indicating high specificity towards the target analytes, these biosensors have also addressed the challenge of food industry by providing high analytical accuracy within complex food matrices. Here, we discuss some of the recent advances in this area and analyze the role and contributions made by electrochemical biosensors in the food industry. This article also reviews the key challenges we believe biosensors need to overcome to become the industry standard.

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Electrocatalytic activity of thianthrene toward one-electron oxidation of guanosine and DNA in a non-aqueous medium

Cited by 3 publications

References 49 publications

Preconcentration of f-Elements from Aqueous Solution Utilizing a Modified Carbon Paste Electrode

Preconcentration of f-Elements from Aqueous Solution Utilizing a Modified Carbon Paste Electrode

Application of Electrochemical Aptasensors toward Clinical Diagnostics, Food, and Environmental Monitoring: Review

Food Safety Analysis Using Electrochemical Biosensors

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