A New Sensor for Simultaneous Determination of Tyrosine and Dopamine Using Iron(III) Doped Zeolite Modified Carbon Paste Electrode

Babaei, Ali; Zendehdel, Mojgan; Khalilzadeh, Balal; Abnosi, Mohammad Hussein

doi:10.1002/cjoc.201090328

Cited by 32 publications

(8 citation statements)

References 34 publications

(30 reference statements)

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“…The limit of detection (LOD) and limit of quantification (LOQ) for TY were calculated by using the following formulas, LOD=3 S/M and LOQ=10 S/M (where S is the standard deviation of blank and M is the slope of the calibration plot), obtained values of LOD and LOQ were 729 nM and 2.43 µM respectively. The obtained detection limit was compared with some related works were reported in Table 1 5,10,29-32 and confirms that SDS/CNTPE has nearly comparable sensitivity and nearer limit of detection.…”

Section: Resultssupporting

confidence: 76%

Design of novel Surfactant Modified Carbon Nanotube PasteElectrochemical Sensor for the Sensitive Investigation of Tyrosineas a Pharmaceutical Drug

et al. 2019

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Purpose: The novel sodium dodecyl sulfate modified carbon nanotube paste electrode (SDS/CNTPE) was used as a sensitive sensor for the electrochemical investigation of L-tyrosine (TY).Methods: The electrochemical analysis of TY was displayed through cyclic voltammetry (CV)and differential pulse voltammetry (DPV). The surface morphology of SDS/CNTPE and barecarbon nanotube past electrode (BCNTPE) was reviewed trough field emission scanning electronmicroscopy (FESEM).Results: The functioning SDS/CNTPE shows a voltammetric response with superior sensitivitytowards TY. This study was conducted using a phosphate buffer solution having neutral pH(pH=7.0). The correlation between the oxidation peak current of TY and concentration of TYwas achieved linearly in CV method, in the range 2.0×10-6 to 5 ×10-5 M with the detection limit729 nM and limit of quantification 2.43 μM. The investigated voltammetric study at SDS/CNTPEwas also adopted in the examination of TY concentration in a pharmaceutical medicine as a realsample with the recovery of 97% to 98%.Conclusion: The modified electrode demonstrates optimum sensitivity, constancy, reproducibility,and repeatability during the electrocatalytic activity of TY.

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Section: Resultssupporting

confidence: 76%

Design of novel Surfactant Modified Carbon Nanotube PasteElectrochemical Sensor for the Sensitive Investigation of Tyrosineas a Pharmaceutical Drug

et al. 2019

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“…In this method, the electrode was designed with different concentrations of thrombin (5,10,20,25,50, 100, 200 and 500 pg. mL −1 ) and their ECL intensities were measured.…”

Section: Ratiometric Methodmentioning

confidence: 99%

“…Since the ECL responses of the CdS and luminol are dependent on the H 2 O 2 concentration in PBS, we carried out the experiments to evaluate and obtain the optimal H 2 O 2 concentration. To do this, in QM and AM, the electrode was prepared using 1000 pg.mL −1 thrombin and used as the working electrode in a PBS (0.1 M, pH = 7.5) with different concentrations of H 2 O 2 (5,10,15,20,25,30,35,40 and 50 mM) at 0.1 V. s −1 . The resulted ECL intensities and peaks are presented in Supplementary material, Fig.…”

Section: H 2 O 2 Concentration Optimizationmentioning

confidence: 99%

“…The use of biosensors is not just limited to health-related applications, it also plays crucial role in genetic surveillance, food quality, drug monitoring and environmental monitoring [4][5][6][7]. Electrochemical [8][9][10][11], optical [12], and electrochemiluminescent (ECL) methods are quite common [2]. The ECL technique has some advantages compared to other methods, making it as a promising approach for clinical detection.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemiluminescence methods using CdS quantum dots in aptamer-based thrombin biosensors: a comparative study

et al. 2019

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The detection of thrombin by using CdS nanocrystals (CdS NCs), gold nanoparticles (AuNPs) and luminol is investigated in this work. Thrombin is detected by three methods. One is called the quenching method. It is based on the quenching effect of AuNPs on the yellow fluorescence of CdS NCs (with excitation/emission wavelengths of 355/550 nm) when placed adjacent to CdS NCs. The second method (called amplification method) is based on an amplification mechanism in which the plasmonics on the AuNPs enhance the emission of CdS NCs through distance related Förster resonance energy transfer (FRET). The third method is ratiometric and based on the emission by two luminophores, viz. CdS NCs and luminol. In this method, by increasing the concentration of thrombin, the intensity of CdS NCs decreases, while that of luminol increases. The results showed that ratiometric method was most sensitive (with an LOD of 500 fg.mL-1), followed by the amplification method (6.5 pg.mL-1) and the quenching method (92 pg.mL-1). Hence, the latter is less useful.

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“…[2][3][4][5][6][7] Diffusion coefficient "D, cm 2 s -1 " values were calculated from Randles-Sevcik equation for a quasi-reversible process. [45][46][47][48] For the electro-oxidation process of L-dopa where n = 2, C =1×10 -6 mol/cm 3 , and the geometrical surface area of CPE (A) = 0.312 cm 2 ; the calculated D values of L-dopa at CPE, CILCE, Au/CPE and Au/CILCE were 4.19×10 -6 cm 2 s -1 , 5.53×10 -6 cm 2 s -1 , 6.18×10 -6 cm 2 s -1 and 2.47×10 -5 cm 2 s -1 , respectively displaying the highest value at Au/CILCE. This suggests that there is enhancing in the mass transfer process of L-dopa from solution bulk to electrode surface and/or the charge transfer process during the electro-oxidation of L-dopa at electrode surface.…”

Section: Influence Of Scan Rate On the Electro-oxidation Of L-dopamentioning

confidence: 99%

Efficient Electrochemical Sensor Based on Gold Nanoclusters/Carbon Ionic Liquid Crystal for Sensitive Determination of Neurotransmitters and Anti-Parkinson Drugs

et al. 2019

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Purpose: Herein we introduce a simple and sensitive sensor for the electrochemical determination of neurotransmitters compounds and anti-Parkinson drugs. Methods: The electrochemical sensor (Au/CILCE) based on gold nanoclusters modified carbon ionic liquid crystal (ILC) electrode was characterized using scanning electron microscopy and voltammetry measurements. Results: The effect of ionic liquid type in the carbon paste composite for the electro-catalytic oxidation of L-dopa was evaluated. Highest current response was obtained in case of ILC compared to other studied kinds of ionic liquids. The effective combination of gold nanoclusters and ILC resulted in extra advantages including large surface area and high ionic conductivity of the nanocomposite. L-dopa is considered one of the most important prescribed medicines for treating Parkinson’s disease. Moreover, a binary therapy using L-dopa and carbidopa proved effective and promising as it avoids the short comings of L-dopa mono-therapy for Parkinson’s patients. The Au/CILCE can detect L-dopa in human serum in the linear concentration range of 0.1 μM to 90 μM with detection and quantification limits of 4.5 nM and 15.0 nM, respectively. Also, the Au/CILCE sensor can simultaneously and sensitively detect L-dopa in the presence of carbidopa with low detection limits. Conclusion: The sensor is advantageous to be applicable for electrochemical sensing of other biologically electroactive species.

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A New Sensor for Simultaneous Determination of Tyrosine and Dopamine Using Iron(III) Doped Zeolite Modified Carbon Paste Electrode

Cited by 32 publications

References 34 publications

Design of novel Surfactant Modified Carbon Nanotube PasteElectrochemical Sensor for the Sensitive Investigation of Tyrosineas a Pharmaceutical Drug

Design of novel Surfactant Modified Carbon Nanotube PasteElectrochemical Sensor for the Sensitive Investigation of Tyrosineas a Pharmaceutical Drug

Electrochemiluminescence methods using CdS quantum dots in aptamer-based thrombin biosensors: a comparative study

Efficient Electrochemical Sensor Based on Gold Nanoclusters/Carbon Ionic Liquid Crystal for Sensitive Determination of Neurotransmitters and Anti-Parkinson Drugs

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