Electrochemical studies of quinine in surfactant media using hanging mercury drop electrode: A cyclic voltammetric study

Dar, Riyaz Ahmad; Brahman, Pradeep Kumar; Tiwari, Sweety; Pitre, K. S.

doi:10.1016/j.colsurfb.2012.04.035

Cited by 34 publications

(14 citation statements)

References 23 publications

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“…Hence, CMEs have been successfully utilized for M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 determination of various drug molecules in our laboratory [10][11][12][13]. Carbon nanotubes (CNTs) have become the subject of intense researches in the last decades because of their unique properties and the promising applications in any aspect of nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Electrochemical behavior of kaempferol and its determination in presence of quercetin employing multi-walled carbon nanotube modified carbon paste electrode

Dar

Naikoo

Hassan

et al. 2015

Analytical Chemistry Research

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Electrochemical behavior of kaempferol and its determination in presence of quercetin employing multiwalled carbon nanotube modified carbon paste electrode, Analytical Chemistry Research (2015), Abstract Electrocatalytic oxidation of kaempferol in presence of quercetin using multiwalled carbon nanotubes modified carbon paste electrode (MWCNTs/CPE) in phosphate buffer of pH 7.73. AbstractThe electrochemical behavior of kaempferol was investigated by cyclic voltammetry (CV) and square wave voltammetry (SWV) at plane and multiwalled carbon nanotubes modified carbon paste electrode (MWCNTs/CPE). Kaempferol produces an anodic peak at MWCNTs modified CPE with a quasi-reversible nature in phosphate buffer of pH 7.73. The oxidized species of kaempferol was found to be stable (Ip a /Ip c ≈1) over scan rates of 100~600 mVs -1 . The same electrode was also found to catalyze the electrode oxidation of quercetin in presence of kaempferol under similar conditions which enabled the simultaneous determination of kaempferol and quercetin. Linearity of peak currents (Ip) vs. concentrations of kaempferol and quercetin was found in the range of 6.72 x 10 -9 M to 40.34 x 10 -9 M with a detection limit of 2.90 x 10 -9 M for kaempferol and 13.0 x 10 -9 M to 50.9 x 10 -9 M with a detection limit of 3.5 x 10 -9 M for quercetin using fast and sensitive SWV. The developed method has been applied for the quantitative analysis of kaempferol in corms and petals of Indian traditional medicine saffron (Crocus sativus) using a phosphate buffer of pH 7.73 and the average percent recoveries obtained are 99.84 and 99.26, respectively.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Electrochemical behavior of kaempferol and its determination in presence of quercetin employing multi-walled carbon nanotube modified carbon paste electrode

Dar

Naikoo

Hassan

et al. 2015

Analytical Chemistry Research

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“…59 As compared to Tween-20 and SDBS, addition of CTAB to the solution containing Qn exhibited appreciable enhancement in reduction peak current, a greater shift in cathodic peak potential and a lower detection limit. 59 As compared to Tween-20 and SDBS, addition of CTAB to the solution containing Qn exhibited appreciable enhancement in reduction peak current, a greater shift in cathodic peak potential and a lower detection limit.…”

Section: Quininementioning

confidence: 90%

“…47,55,57,59 Human serum and plasma samples were usually centrifuged to precipitate the proteins and then diluted with the buffer solution before carrying out the analysis. Pharmaceutical formulation samples were directly analysed after dissolving in water or any other solvent, which was sometimes followed by filtration.…”

Section: Sample Preparationmentioning

confidence: 99%

Research progress in electroanalytical techniques for determination of antimalarial drugs in pharmaceutical and biological samples

et al. 2016

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“…Surfactants are very effective to be used in the electroanalysis of organic compounds, biologically important compounds, drugs, some important inorganic ions, and metals [97][98][99]. Moreover, micelles have also been employed as selective masking agents to improve selectivity and sensitivity of electrochemical analysis [100].…”

Section: The Role Of Surfactants In Electrochemistrymentioning

confidence: 99%

Self-Assembled Monolayers on Nano-structured Composites for Electrochemical Sensing Applications

Atta¹,

El-Ads²,

Galal³

2015

Handbook of Nanoelectrochemistry

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Self-assembled monolayer (SAM) represents one of the methods to precisely modify surface structures in the nanoscale dimension. It has opened up a new era of exploration and has a profound impact on sensors and biosensors due to its unique properties. Different self-assemblies will be considered in this chapter: SAM of metallic nanoparticles on polymeric film, SAM of surfactant on polymeric film, and SAM of S-containing compounds on nanometallic films. The main goal of this chapter is to present comprehensive collection of the recent achievements in this area. Several issues will be discussed including the morphology, sensitivity, selectivity, stability, and electrochemical properties of the sensor.

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Electrochemical studies of quinine in surfactant media using hanging mercury drop electrode: A cyclic voltammetric study

Cited by 34 publications

References 23 publications

WITHDRAWN: Electrochemical behavior of kaempferol and its determination in presence of quercetin employing multi-walled carbon nanotube modified carbon paste electrode

WITHDRAWN: Electrochemical behavior of kaempferol and its determination in presence of quercetin employing multi-walled carbon nanotube modified carbon paste electrode

Research progress in electroanalytical techniques for determination of antimalarial drugs in pharmaceutical and biological samples

Self-Assembled Monolayers on Nano-structured Composites for Electrochemical Sensing Applications

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