Development of amperometric l-tyrosine sensor based on Fe-doped hydroxyapatite nanoparticles

Kanchana, P.; Lavanya, N.; Sekar, C.

doi:10.1016/j.msec.2013.10.013

Cited by 67 publications

(25 citation statements)

References 36 publications

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“…Pretreatment of glassy carbon electrode required in the case of nano-Au/CA/GCE and MWCNTsmodified GCE [45,46], and the latter requires timeconsuming preparation. No analytical applications were performed at Fe-HA/tyrosinase modified GCE and Nafion/TiO 2 -GR/GCE [47,48]. MCPE/COOH-MWCNTs show better detection limit and wider linear dynamic range for Tyr determination compared to SWCNH modified GCE and AuNPs/poly (trisamine)/GCE [49,50].…”

Section: Comparison Of Analytical Performance Of Mcpe/cooh-mwcnts Witmentioning

confidence: 99%

Electrocatalytic oxidation of l-tyrosine at carboxylic acid functionalized multi-walled carbon nanotubes modified carbon paste electrode

D’Souza

Mascarenhas

Satpati

et al. 2015

Ionics

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The electrocatalytic oxidation of L-tyrosine (Tyr) was investigated on a carboxylic acid functionalised multiwalled carbon nanotubes modified carbon paste electrode using cyclic voltammetry and amperometry. The surface morphology of the electrodes was studied using field emission (FE)-SEM images, and the interface properties of bare and modified electrodes were investigated by electrochemical impedance spectroscopy (EIS). The influence of the amount of modifier loading and the variation of the pH of the solution on the electrochemical parameters have been investigated. Cyclic voltammetry was carried out to study the electrochemical oxidation mechanism of Tyr, which showed an irreversible oxidation process at a potential of 637.0 mV at modified electrode. The anodic peak current linearly increased with the scan rate, suggesting that the oxidation of Tyr at modified electrode is an adsorption-controlled process. A good linear relationship between the oxidation peak current and the Tyr concentration in the range of 0.8-100.0 μM was obtained in a phosphate buffer solution at pH 7.0 with a detection limit of 14.0± 1.36 nM (S/N=3). The practical utility of the sensor was demonstrated by determining Tyr in spiked cow's milk and human blood serum. The modified electrode showed excellent reproducibility, long-term stability and antifouling effects.

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Section: Comparison Of Analytical Performance Of Mcpe/cooh-mwcnts Witmentioning

confidence: 99%

Electrocatalytic oxidation of l-tyrosine at carboxylic acid functionalized multi-walled carbon nanotubes modified carbon paste electrode

D’Souza

Mascarenhas

Satpati

et al. 2015

Ionics

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“…This sensor showed a good electrocatalytic response to the reduction of H 2 O 2 which enabled a low detection limit (0.35 M). Kanchana et al (2014) developed an electrochemical biosensor based on Fe-doped HA nanoparticles towards to detection of L-tyrosine [16]. Tablet shaped nanostructured Fe-HA, synthesized by microwave irradiation method, had an average size of 104 (±5) nm.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of aptamer immobilization using egg shell-derived nano-sized spherical hydroxyapatite for thrombin detection in neuroclinic

Derkuş

Arslan

Emregül

et al. 2016

Talanta

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“…A great variety of cationic and anionic substitutions in HA is possible due to its "open structure'' [12,13]. In our earlier studies, we have demonstrated the applicability of HA based electrodes for the 3 determination of tyrosine, uric acid and folic acid [14][15][16]. The hydroxyapatite NPs modified GCE have been proved to be highly sensitive and reliable for the detection of the chosen analytes.…”

Section: Introductionmentioning

confidence: 92%

Electrochemical detection of mercury using biosynthesized hydroxyapatite nanoparticles modified glassy carbon electrodes without preconcentration

et al. 2015

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An electrochemical method for the determination of trace levels of mercury (II) ions using hydroxyapatite (HA) nanoparticles modified glassy carbon electrode (GCE) by square wave voltammetry is described for the first time. HA nanoparticles biosynthesized using Aloe vera plant (Av) extract exhibited improved electrocatalytic activity towards Hg 2+ ions when compared to pristine HA. The Av-HA modified GCE showed an excellent selectivity and improved sensitivity towards the detection of Hg 2+ without requiring preconcentration of mercury during voltammetric detection. Operational parameters such as pH, supporting electrolyte and scanning potential range were optimized. Under the optimum experimental conditions, the anodic peak current is proportional to the concentrations of mercury over a wide range of 2.0 × 10 -7 to 2.1 ×10 -4 M with the lowest detectable concentration of 141 nM.The Av-HA modified GCE showed good selectivity towards mercury in the presence of potential interferents such as copper, lead, cadmium, silver and zinc. The fabricated sensor displayed good reproducibility and is suitable for the determination of mercury in tap water and industry waste water.

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Development of amperometric l-tyrosine sensor based on Fe-doped hydroxyapatite nanoparticles

Cited by 67 publications

References 36 publications

Electrocatalytic oxidation of l-tyrosine at carboxylic acid functionalized multi-walled carbon nanotubes modified carbon paste electrode

Electrocatalytic oxidation of l-tyrosine at carboxylic acid functionalized multi-walled carbon nanotubes modified carbon paste electrode

Enhancement of aptamer immobilization using egg shell-derived nano-sized spherical hydroxyapatite for thrombin detection in neuroclinic

Electrochemical detection of mercury using biosynthesized hydroxyapatite nanoparticles modified glassy carbon electrodes without preconcentration

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