Foroozan Hasanpour

Payame Noor University, Teheran, Tehrān, Iran

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Publications (15)31.94 Total impact

  • Ionics 08/2015; DOI:10.1007/s11581-015-1515-y · 1.84 Impact Factor
  • Microchimica Acta 08/2015; DOI:10.1007/s00604-015-1588-3 · 3.72 Impact Factor
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    ABSTRACT: A new azoferrocene derivative N-4,4’-azodianiline (ferrocenyl Schiff base) (ADAF, [Fe(cp)(azcp)]), was synthesized by reaction of ferrocene carbaldehyde and 4,4’-azodianiline in n-hexane. Then, a novel multiwalled carbon nanotubes/ carbon-paste modified electrode using ADAF was fabricated for the electrocatalytic determination of glutathione (GSH) in hemolysed erythrocyte. The measurements were carried out by the application of differential pulse voltammetry, cyclic voltammetry, and chronoamperometry. It was found that under the optimum conditions (pH = 6), the oxidation of GSH occurs at a potential about +0.52 V less positive than for the unmodified carbon-paste electrode. The electron-transfer coefficient ( ) and rate constant for the chemical reaction between GSH and redox sites in the modified electrode were found to be 0.36 and cm mol , respectively. The catalytic peak current was linearly dependent on the GSH concentration in the range of 0.3–3350 with a detection limit of 0.08 . The proposed method was applied for the highly sensitive determination of GSH in hemolysed erythrocyte using the standard addition method.
    IEEE Sensors Journal 08/2015; 15(8):1-1. DOI:10.1109/JSEN.2015.2423325 · 1.85 Impact Factor
  • Masoumeh Taei · Foroozan Hasanpour · Elaheh Dehghani
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    ABSTRACT: A novel doxorubicin sensor has been developed by electrodepositing of copper nanowires on Mg2Al layered double hydroxides modified glassy carbon. The morphology of synthesized Cu nanowires/Mg2 Al layered double hydroxides was characterized by field-emission scanning electron microscopy and energy dispersive X-ray spectroscopy. The modified electrode has a catalytic effect on the oxidation current of doxorubicin. The oxidation mechanism was studied using cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. Under optimized chemical and instrumental condition, the differential pulse voltammetry response of modified electrode toward doxorubicin shows a linear concentration range of 10.0–2110.0 nmol/L with the detection limit of 0.02 nmol/L at the signal to noise of 3. Satisfactory results have been achieved for the determination of doxorubicin with a doxorubicin injection solution and biological samples.
    Journal of the Taiwan Institute of Chemical Engineers 04/2015; DOI:10.1016/j.jtice.2015.03.016 · 3.00 Impact Factor
  • M. Taei · F. Hasanpour · G. Zahedi
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    ABSTRACT: A carbon-paste electrode modified with the N-4,4'-azodianiline (ferrocenyl Schiff base) and with multiwall carbon nanotubes was used as a highly sensitive and fairly selective electrochemical sensor for trace level determination of captopril. This modified electrode shows very efficient electrocatalytic activity for anodic oxidation of captopril via substantially decreasing of anodic overpotential. The measurements carried out by application of electrochemical impedance spectroscopy, differential pulse voltammetry, cyclic voltammetry and chronoamperometry. It has been found that under optimum conditions, the oxidation of captopril occurs at potential less positive than the unmodified carbon paste electrode. The kinetic parameters such as electron transfer coefficient (α) and rate constant for chemical reaction between captopril and redox sites in the modified electrode were 0.31 and 1.82 ×102 cm3 mol-1 s-1, respectively. The catalytic peak current was linearly dependent on the captopril concentration in the range of 0.1-625.0 µmol L-1 with a detection limit of 0.03 µmol L-1. Finally, the modified electrode was examined as a selective, simple, and a precise new electrochemical sensor for the determination of captopril in real sample, such as urine, with satisfactory results. KEY WORDS: Captopril, N-4,4'-azodianilineferrocene, Modified carbon paste electrode, Multiwall carbon nanotubes Bull. Chem. Soc. Ethiop. 2015, 29(1), 149-156DOI: http://dx.doi.org/10.4314/bcse.v29i1.14
    Bulletin of the Chemical Society of Ethiopia 01/2015; 29(1):149. DOI:10.4314/bcse.v29i1.14 · 0.49 Impact Factor
  • masoumeh taei · hossein salavati · foroozan hasanpour · ali shafiei
    IEEE Sensors Journal 01/2015; DOI:10.1109/JSEN.2015.2474262 · 1.85 Impact Factor
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    ABSTRACT: A chemiluminescence (CL) immunoassay was developed to determine human growth hormone (hGH) based on copper-enhanced gold nanoparticles. In this method, gold nanoparticles were deposited on polystyrene wells for adsorption of human growth antibodies as well as catalyst for reducing of copper ions from the copper enhancer solution. The reduction of copper ions was prevented where the gold nanoparticles were covered by the antibody-antigen immunocomplex. The deposited copper on Au nanoparticles was then dissolved in HNO(3) solution and quantified using the CL method. The CL intensity response was logarithmically dependent on the hGH concentrations over the range 0.2-50 ng/mL, with a detection limit (3σ) of 0.036 ng/mL. Copyright © 2012 John Wiley & Sons, Ltd.
    Luminescence 09/2013; 28(5). DOI:10.1002/bio.2438 · 1.68 Impact Factor
  • Masoumeh Taei · Abouzar Shafizadeh · Masoud Fouladgar · Foroozan Hasanpour
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    ABSTRACT: The Chromazurol s has been electropolymerized on the glassy carbon electrode and the Poly- Chromazurol s modified glassy carbon electrode (PCSMGCE) has shown excellent electrocatalytic activity toward the oxidation of ascorbic acid in phosphate buffer solution (pH=3). It was used for the simultaneous determination of ascorbic acid (AA), dopamine (DA), and uric acid (UA). Analytical parameters were optimized and electrochemical behavior of modified electrode was studied. The calibration curves were obtained over the range of 3.0-2200.0 μmol L–1 AA, 0.09-980.0 μmol L–1 DA, and 0.05-900.0 μmol L–1 UA. Detection limits of 1.7 μmol L–1 AA, 0.05 μmol L–1 DA, and 0.03 μmol L–1 UA were obtained at pH 3.0. Prepared modified electrode had satisfactory results for determination of DA, AA and UA in dopamine injection solution, vitamin C tablets and human urine samples
  • Source
    FOROOZAN HASANPOUR · HOSSEIN TEIMORI · MASOUD FOULADGAR · MASOUMEH TAEI
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    ABSTRACT: A sensitive and selective procedure is presented for the voltammetric determination of cobalt. The procedure involves an adsorptive accumulation of cobalt Pyrogallol Red (PGR) complex on a stationary mercury drop electrode, followed by cathodic stripping voltammetry measurement of the reduction current of the adsorbed complex at –1.17 V (vs. Ag/AgCl). The optimum conditions for the determination of cobalt include pH 11.0, 35 μM Pyrogallol Red, an accumulation potential of –0.9 V (vs. Ag/AgCl) and scan rate 80 mV s-1. The peak current is proportional to the concentration of cobalt over the concentration range 5.0 to 280 ng mL-1 with a detection limit of 1 ng mL-1 and an accumulation time of 140 s. The method was applied to the determination of cobalt in analytical grade NaCl and water samples.
    Journal of the Serbian Chemical Society 01/2013; 73(5):717. DOI:10.2298/JSC120305070H · 0.89 Impact Factor
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    ABSTRACT: In this work, we propose chlorpromazine as a new mediator for the rapid, sensitive, and highly selective voltammetric determination of glutathione (GSH) using multiwall carbon nanotubes paste electrode (MWCNTPE). The experimental results showed that the carbon nanotubes paste electrode has a highly electrocatalytic activity for the oxidation of GSH in the presence of chlorpromazine as a mediator. Cyclic voltammetry, double potential step chronoamperometry, and differential pulse voltammetry (DPV) are used to investigate the suitability of chlorpromazine at the surface of MWCNTPE as a mediator for the electrocatalytic oxidation of GSH in aqueous solutions. It is shown that chlorpromazine can catalyze the oxidation of GSH in an aqueous buffer solution to produce a sharp oxidation peak current at about +0.70 versus Ag/AgCl as a reference electrode. Kinetic parameters such as electron transfer coefficient and catalytic reaction rate constant, k/h, are also determined. Using DPV and under the optimum conditions at pH 4.0, the electrocatalytic oxidation peak current of GSH shows a linear dependence on GSH concentration in the GSH concentration range of 0.3 to 18.3µM. The detection limit (3σ) is determined to be 0.16µM. The relative standard deviation for 1.5 and 5.0µM GSH are found to be 3.7% and 2.5%, respectively. The proposed method may, thus, also be used as a novel, selective, simple, and precise method for the voltammetric determination of GSH in such real samples as hemolyzed erythrocyte. KeywordsChlorpromazine-Electrocatalysis-Glutathione determination-Voltammetric methods
    Journal of Solid State Electrochemistry 08/2010; 14(8):1415-1423. DOI:10.1007/s10008-009-0978-z · 2.23 Impact Factor
  • Ali A Ensafi · M Taei · T Khayamian · F Hasanpour
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    ABSTRACT: A simple and sensitive method is proposed for the electrochemical determination of enrofloxacin (ENRO) and its primary metabolite ciprofloxacin (CIPRO) at a multiwall carbon nanotubes/glassy carbon electrode (MWCNT/GCE) using a least-squares support vector machine (LS-SVM) and linear sweep voltammetry. Simultaneous determination of ENRO and CIPRO at bare glassy carbon is associated with certain difficulties due to voltammogram overlapping and their low sensitivity. The resolution of the mixture was carried out using LS-SVM as a multivariate calibration method. Under the optimum conditions at pH 7.0, the linear sweep currents increased linearly with ENRO and CIPRO concentrations in ranges of 2.0-780.0 micromol L(-1) (0.7-280.3 microg mL(-1)) and 3.0-1200 micromol L(-1) (1.0-397.7 microg mL(-1)), respectively. The detection limits for ENRO and CIPRO were 0.5 and 0.9 micromol L(-1), respectively. The proposed method was applied to simultaneously determine both compounds in human urine, plasma and in pharmaceutical samples.
    Analytical Sciences 07/2010; 26(7):803-8. DOI:10.2116/analsci.26.803 · 1.40 Impact Factor
  • F Hasanpour · Ali A Ensafi · T Khayamian
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    ABSTRACT: In this work, both the batch and flow injection chemiluminescence (CL) methods have been proposed for the simultaneous determination of two structurally similar beta-lactams including amoxicillin and clavulanic acid (CLAV). Chemiluminescence spectral overlap of these two structurally similar beta-lactams is the main limitation for the simultaneous analysis of the two compounds. Least squares support vector regression (LS-SVR) was applied to relate concentration of both the compounds to their CL profiles. The parameters of the model, consisting of kernel parameter, sigma(2), and the regularization parameter, gamma, were optimized by constructing different LS-SVR models and the model with the minimum root mean squared error of cross-validation (RMSECV) for the calibration set was selected as the best model and its parameters were chosen as the optimized values. The performance of LS-SVR model was compared with Partial Least Squares (PLS) and the results revealed the superiority of the LS-SVR over PLS model. Under the optimized experimental conditions for both the compounds, when LS-SVR was applied, the detection limits obtained were 0.2 and 0.60 micromol L(-1) in the batch mode and 0.3 and 0.5 micromol L(-1) in the flow injection mode for CLAV and amoxicillin, respectively. The proposed method was utilized for the simultaneous determination of the compounds in pharmaceutical formulations and spiked plasma samples.
    Analytica chimica acta 06/2010; 670(1-2):44-50. DOI:10.1016/j.aca.2010.05.001 · 4.52 Impact Factor
  • Source
    Ali A Ensafi · F Hasanpour · T Khayamian · A Mokhtari · M Taei
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    ABSTRACT: In this work, a batch chemiluminescence (CL) method has been proposed for the simultaneous determination of two structurally similar alkaloids, noscapine and thebaine. The method is based on the kinetic distinction of the CL reactions of noscapine and thebaine with Ru(bipy)(3)(2+) and Ce(IV) system in a sulfuric acid medium. The least squared support vector machine (LS-SVM) regression was applied for relating the concentrations of both compounds to their CL profiles. The parameters of the model consisting of sigma(2) and gamma were optimized by constructing LS-SVM models with all possible combinations of these two parameters to select the model with the minimum root mean squared error of cross validation (RMSECV) as the best. The parameters of this model were then selected as optimized values. Under the optimized experimental conditions for both compounds, the detection limits obtained using the LS-SVM regression were 0.08 and 0.1 micromo lL(-1) for noscapine and thebaine, respectively. The proposed method was utilized for the simultaneous determination of the compounds in pharmaceutical formulations and plasma samples with satisfactory results.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 02/2010; 75(2):867-71. DOI:10.1016/j.saa.2009.12.021 · 2.13 Impact Factor
  • Ali A Ensafi · F Hasanpour · T Khayamian
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    ABSTRACT: In this work, chemiluminescence (CL) behaviors of two selected phenothiazines, namely promazine and fluphenazine hydrochloride, were investigated for their simultaneous determination using oxidation of Ru(bipy)(3)(2+) by Ce(4+) ions in acidic media. This method is based on the kinetic distinction of the CL reactions of fluphenazine and promazine with Ru(bipy)(3)(2+) and Ce(4+) system in a sulfuric acid medium. Least square support vector regression models were constructed for relating concentrations of both compounds to their CL profiles. The parameters of the model consisting of sigma(2) and gamma were optimized using all possible combinations of sigma(2) and gamma to select the model with the minimum root mean square cross validation. Under optimized conditions, the univariate calibration curve was linear over the concentration ranges of 0.4-30.0 microg mL(-1) and 0.07-5.0 microg mL(-1) with detection limits of 0.1 microg mL(-1) and 0.04 microg mL(-1) for promazine and fluphenazine, respectively. The influence of potential interfering substances on the determination of promazine and fluphenazine were studied. The proposed method was used for simultaneous determination of both compounds in synthetic mixtures and in spiked human plasma.
    Talanta 08/2009; 79(2):534-8. DOI:10.1016/j.talanta.2009.04.023 · 3.51 Impact Factor
  • A A Ensafi · T Khayamian · F Hasanpour
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    ABSTRACT: In this work, a new sensitive method is introduced for analysis of glutathione at trace levels in blood samples. The method is based on the effect of glutathione on the chemiluminescence signal of the oxidation of luminol by sodium periodate in basic solution. The influence of chemical and manifold variables on the sensitivity was studied. At the optimized conditions, the linear range for the determination of glutathione was 1.0x10(-8) to 1.0x10(-5) mol L(-1) with the detection limit (3sigma) of 8x10(-9) mol L(-1). The relative standard deviation for 10 repeated measurements of 1.0x10(-6) mol L(-1) of glutathione was 4%. The results of the method were compared with the Ellman reference method and no significant difference was found. The influence of potential interference substances on the determination of glutathione was studied. The proposed method was applied successfully for the determination of glutathione in real samples such as erythrocyte hemolysed in normal subjects and diabetes.
    Journal of Pharmaceutical and Biomedical Analysis 06/2008; 48(1):140-4. DOI:10.1016/j.jpba.2008.04.028 · 2.83 Impact Factor