Electrochemical detection of celecoxib at a polyaniline grafted multiwall carbon nanotubes modified electrode

Manesh, Kalayil Manian; Santhosh, P.; Komathi, S.; Kim, Nam Hee; Park, Jong Wook; Gopalan, A.

doi:10.1016/j.aca.2008.07.050

Cited by 37 publications

(15 citation statements)

References 33 publications

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“…Also, the proposed method was compared with voltammetric methods, too. 4,34 The results confirm that the modified electrode retained its efficiency for the determination of CEL in pharmaceutical as well as serum samples for months without any significant divergence in its response.…”

Section: Effect Of the Scan Ratesupporting

confidence: 65%

“…In Table 3 the linear calibration range, limit of detection and real sample of several previously published methods 34,36 are compared with those of the proposed AuNPs/GR-CILE electrochemical sensor for the determination of CEL. The proposed electrochemical sensor possesses a short response time, low cost, and could be used for months without any significant divergence in its response in a real sample.…”

Section: Comparison Of the Sensitivity Of Aunps/gr-cile With That Of mentioning

confidence: 99%

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Electrochemical Determination of Celecoxib on a Graphene Based Carbon Ionic Liquid Electrode Modified with Gold Nanoparticles and Its Application to Pharmaceutical Analysis

et al. 2013

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A graphene-based carbon ionic liquid electrode modified with gold nanoparticles was fabricated. The electrochemical response of the modified electrode toward celecoxib was studied by means of cyclic voltammetry and differential pulse voltammetry. The structural morphology of the modified electrode was characterized by a scanning electron microscopy technique and electrochemical impedance spectroscopy. The prepared electrode showed excellent electrocatalytic activity in the reduction of celecoxib in a phosphate buffer solution, leading to remarkable enhancements in the corresponding peak currents and lowering of the peak potential. The advantages are related to the unique properties of graphene and gold nanoparticles such as a large surface area and increased electron-transfer abilities. Differential pulse voltammetry was applied to the quantitative determination. The calibration curve was linear in the concentration range of 0.5 to 15 μM and the detection limit was about 0.2 μM (Sb/N = 3). The proposed electrochemical sensor was successfully applied to the determination of celecoxib in real samples.

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Section: Effect Of the Scan Ratesupporting

confidence: 65%

Section: Comparison Of the Sensitivity Of Aunps/gr-cile With That Of mentioning

confidence: 99%

Electrochemical Determination of Celecoxib on a Graphene Based Carbon Ionic Liquid Electrode Modified with Gold Nanoparticles and Its Application to Pharmaceutical Analysis

et al. 2013

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“…3 For the fabrication of electrochemical biosensor, CNTs have been used as an electrode modifying material on the surface of platinum, 4 glassy carbon, 5 graphite, 6 and gold, 7 electrodes. CNT modified electrodes have been shown to possess improved sensitivity and selectivity toward the determination of many biomolecules, including cytochrome-c, 8 dihydronicotinamide adenine dinucleotide, 9 glucose, 10 H 2 O 2 11 and ascorbic acid. 12 Alternatively, CNTs/conducting polymers (CPs) composites have received significant interest due to the coating of positively charged CP onto MWNT can lead to new composite materials possessing the properties of each component with a synergistic effect that would be useful in particular applications.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical grafting of poly(2,5-dimethoxy aniline) onto multiwalled carbon nanotubes nanocomposite modified electrode and electrocatalytic oxidation of ascorbic acid

et al. 2011

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A modified electrode was fabricated by grafting poly(2,5-dimethoxyaniline) (PDMA) onto multiwalled carbon nanotubes (MWNTs) and used for the electrocatalytic oxidation of ascorbic acid (AA). Cyclic voltammetry was used to fabricate the modified electrode and demonstrate the electroactivity of MWNT-g-PDMA-ME towards AA. Field emission scanning electron microscopy (FESEM) of MWNT-g-PDMA-ME revealed the combined presence of MWNT and PDMA. The MWNT-g-PDMA-ME exhibited excellent performance for AA at 320 mV with a high sensitivity (12.78 µA/mM) and linear concentration range of 1 to 5 mM (correlation coefficient of 0.9991). Differential pulse voltammetry (DPVs) showed that MWNT-g-PDMA-ME experiences negligible interference from other electro-active components.

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“…As one of the most significant conducting polymers, polyaniline (PANI) has been used for the fabrication of electrochemical biosensors due to its good conductivity and electrochemical activity [11][12][13]. During the fabrication of electrochemical biosensors, PANI is commonly synthesized by electropolymerization of aniline on the surface of electrodes and biomolecules are added into the monomer solution for subsequent entrapment.…”

Section: Introductionmentioning

confidence: 99%

Improved electrochemical performances of polyaniline nanotubes-poly-L-lysine composite for label-free impedance detection of DNA hybridization

et al. 2010

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A sensitive label-free DNA hybridization biosensing platform was fabricated based on the synergistic effect of polyaniline nanotubes (PANI nt ) and poly-L-lysine (pLys). The composite of pLys and PANI nt was coated onto the carbon paste electrode (CPE) to form a uniform and very stable nanocomposite membrane. The pLys in the composite film not only acts as a membrane to retain good electron transfer capability of PANI nt even at physiological pH, but also possesses fine biocompatibility for bio-analytes. DNA probes with negatively charged phosphate groups were readily linked to the positively charged pLys surface due to the strong electrostatic affinity. The synergistic effect of PANI nt and pLys could significantly enhance the sensitivity of DNA hybridization recognition. The phosphinothricin acetyltransferase (PAT) gene fragment from transgenic corn and the polymerase chain reaction amplification of the terminator of nopaline synthase gene from the real sample of a kind of transgenic soybean were detected by this DNA electrochemical biosensor via label-free impedance method. This stable composite gives convenient permselectivity properties as a transducer material for the design of modern electrochemical impedance biosensor using [Fe(CN) 6 ] 3/4 as an indicator.

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Electrochemical detection of celecoxib at a polyaniline grafted multiwall carbon nanotubes modified electrode

Cited by 37 publications

References 33 publications

Electrochemical Determination of Celecoxib on a Graphene Based Carbon Ionic Liquid Electrode Modified with Gold Nanoparticles and Its Application to Pharmaceutical Analysis

Electrochemical Determination of Celecoxib on a Graphene Based Carbon Ionic Liquid Electrode Modified with Gold Nanoparticles and Its Application to Pharmaceutical Analysis

Electrochemical grafting of poly(2,5-dimethoxy aniline) onto multiwalled carbon nanotubes nanocomposite modified electrode and electrocatalytic oxidation of ascorbic acid

Improved electrochemical performances of polyaniline nanotubes-poly-L-lysine composite for label-free impedance detection of DNA hybridization

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