Publications

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D
Ibrahim, N., E. S. Elzanfaly, A. E. El Gendy, and S. A. Hassan, "Development, optimization, and validation of a green spectrofluorimetric method for the determination of moxifloxacin using an experimental design approach", Research Journal of Pharmacy and Technology, vol. 14, no. 4, pp. 1880-1886, 2021. AbstractWebsite
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Elzanfaly, E. S., S. A. Hassan, M. Y. Salem, and B. E. - Z. A. Salem, "Different signal processing techniques of ratio spectra for spectrophotometric resolution of binary mixture of bisoprolol and hydrochlorothiazide; a comparative study", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , vol. 140, pp. 334–343, 2015.
E
Bassuoni, Y. F., H. A. M. Essam, E. S. Elzanfaly, H. E. Zaazaa, and K. O. Kelani, "Ecofriendly Determinations of Pseudoephedrine HCl and Triprolidine HCl in Their Tablet Form: Evaluation of Dissolution Profile ", Chemistry Select , vol. 4, pp. 8946 –8952, 2019.
MN Saad, MS Mabrouk, H. M. Essam, E. S. Elzanfaly, and S. M. Amer, "Economic chromatographic methods for simultaneous quantitation of some fluoroquinolones and corticosteroids present in different binary ophthalmic formulations", Journal of Liquid Chromatography and Related Technologies, vol. 43, no. 7-8, pp. 271-281, 2020. AbstractWebsite
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Mahmoud, A. M., MN Saad, MS Mabrouk, E. S. Elzanfaly, S. M. Amer, and H. M. Essam, "An electrochemical sensing platform to determine tetrahydrozoline HCl in pure form, pharmaceutical formulation, and rabbit aqueous humor", Analytical Methods, vol. 12, no. 22, pp. 2903-2913, 2020. AbstractWebsite
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F
w. Darwish, H., E. S. Elzanfaly, A. S. Saad, and A. E. - B. Abdelaleem, "Full spectrum and selected spectrum based multivariate calibration methods for simultaneous determination of betamethasone dipropionate, clotrimazole and benzyl alcohol: Development, validation and application on commercial dosage form", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 169, pp. 50–57, 2016.
Darwish, H. W., E. S. Elzanfaly, A. S. Saad, and A. E. - B. Abdelaleem, "Full spectrum and selected spectrum based multivariate calibration methods for simultaneous determination of betamethasone dipropionate, clotrimazole and benzyl alcohol: Development, validation and application on commercial dosage form", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 169: Elsevier, pp. 50–57, 2016. Abstract
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G
I
Elzanfaly, E. S., S. A. Hassan, M. Y. Salem, and B. A. El-Zeany, "In-line potentiometric monitoring of dissolution behavior ofverapamil hydrochloride versus traditional pharmacopeial method: Acomparative study", Sensors and Actuators, vol. B 228, pp. 587–594, 2016.
El-Setouhy, D. A., A. B. Ibrahim, M. M. Amin, O. M. Khowessah, and E. S. Elzanfaly, "Intranasal haloperidol-loaded miniemulsions for brain targeting: Evaluation of locomotor suppression and in-vivo biodistribution", European Journal of Pharmaceutical Sciences, vol. 92, pp. 244-254, 2016.
Saad, A. S., N. S. Ismail, N. S. Gaber, and E. S. Elzanfaly, "Introducing a polymeric ion exchanger as a modifier for carbon- paste potentiometric sensors", Journal of the Electrochemical Society, vol. 168, no. 1, 2021. AbstractWebsite
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Bassuoni, Y. F., E. S. Elzanfaly, H. M. Essam, and H. E. Zaazaa, "Ion Selective Electrode Approach for In-line Determination of Benzydamine Hydrochloride in Different Matrices of Pharmaceutical Industry ", Anal. Bioanal. Electrochem, vol. 9, issue 1, pp. 65-79, 2017.
Elzanfaly, E. S., Y. F. Bassuoni, H. A. M. Essam, and H. E. Zaazaa, "Ion Selective Membrane Electrodes for Determination of Cetrimide in Pure form and in Pharmaceutical Formulations ", Anal. Bioanal. Electrochem. , vol. 7 , issue 4, pp. 401-414, 2015. cetrimide_ise_2015.pdf
AbdElHamid, G., M. R. Elghobashy, E. S. Elzanfaly, S. M. Amer, and S. Z. ElKhateeb, "Ion Selective Membrane Electrodes for Stability Indicating Determination of Amisulpride", Anal. Bioanal. Electrochem. , vol. 4, issue 6, pp. 579 – 592, 2012.
, "Ion Selective Membrane Electrodes for Stability Indicating Determination of Benoxinate Hydrochloride in Pure form and in Drug Product", Anal. Bioanal. Electrochem. , vol. 5, issue 2, pp. 166 - 177, 2013. Abstract

This paper presents a comparative study between four sensors
constructed to determine benoxinate hydrochloride (BX) in the presence of its hydrolysis
induced degradation product using different ion association complexes and plasticizers.
Precipitation based technique was used for sensors fabrication. The BX complexes with the
cationic exchangers; BX- reinikate, BX-tetraphenylborate, BX-phosphotungestate, and BXtetrakis
were obtained in situ by soaking the PVC membranes in 1×10-2 BX solution.
Dioctylphthalate and nitrophenyl octyl ether were used as solvent mediators. The proposed
sensors showed fast, stable Nernstian responses across a relatively wide BX concentration
range (5×10-5 to 10-1 M) in the pH range of 4-6. The suggested sensors could be used for
several weeks without any measurable change in sensitivity. They displayed good selectivity
for BX in presence of its degradation product, common inorganic and organic species. The
proposed sensors were successfully applied for the determination of BX in pure powder form
and eye drops where good recoveries were obtained.

ElHamid, G. A., M. R. Elghobashy, E. S. ElZanfaly, S. M. Amer, and S. Z. ElKhateeb, "Ion selective membrane electrodes for stability-indicating determination of amisulpride", Anal Bioanal Electrochem, vol. 4, pp. 579–592, 2012. Abstract
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Elzanfaly, E. S., H. E. Zaazaa, and H. A. Merey, "Ion Selective Phosphotungestate and β-cyclodextrin Based Membrane Electrodes for Stability-Indicating Determination of Midodrine Hydrochloride", Acta Chim. Slov., vol. 60 , issue 2, pp. 256–262, 2013. Abstract

This paper reports the construction and evaluation of two ion selective electrodes for the determination midodrine hydrochloride (MD) by direct potentiometry in pure drug substance and in tablet formulations. Precipitation based technique was used for fabrication of the first membrane sensor (sensor 1) using phosphotungestate (PT) and dioctylphthalate (DOP) as cation exchanger and solvent mediator, respectively. β-cyclodextrin (β-CD)-based technique with PT as a fixed anionic site in PVC matrix was used for fabrication of the second membrane sensor (sensor 2). The proposed sensors showed fast, stable Nernstian responses of 54 and 56 mV/decade for sensors 1 and 2, respectively, across a relatively wide MD concentration range (1 × 10–4 to 1 × 10–1 mol/L and 5 × 10–5 to 1 × 10–1 mol/L for sensor 1 and 2, respectively) in the pH range of 5–7. Sensor 1 and sensor 2 can be used for three and two weeks, respectively without any measurable change in sensitivity. The suggested electrodes succeeded to determine intact MD in the presence of up to 10% of its degradation product and displayed good selectivity in presence of common inorganic and organic species.

M
Hassan, S. A., E. S. Elzanfaly, M. Y. Salem, and B. A. El-Zeany, "Mean centering of double divisor ratio spectra, a novel spectrophotometric method for analysis of ternary mixtures", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , vol. 153, pp. 132-142, 2016.
Hassan, S. A., E. S. Elzanfaly, M. Y. Salem, and B. A. El-Zeany, "Mean centring of double divisor ratio spectra, a novel pectrophotometric method for analysis of ternary mixtures ", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , vol. 153, pp. 132–142, 2015.
Ramadan, N. K., M. N. Morkos, and E. S. Elzanfaly, "Membrane electrodes for the simultaneous determination of vitamins B1, B6 and B12", Research & Reviews in ElectroChemistry, vol. 2 , issue 2, pp. 78-87, 2010.
Elzanfaly, E. S., H. E. Zaazaa, A. T. Soudi, and M. Y. Salem, "Multivariate Validated Models for Simultaneous Determination of Ibuprofen and Famotidine in the Presence of Related Substances", Journal of AOAC International, vol. 101, no. 4: Oxford University Press, pp. 1001–1007, 2018. Abstract
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Boltia, S. A., A. T. Soudi, E. S. Elzanfaly, and H. E. Zaazaa, "A new plan for determining drug pharmacokinetics by establishment of urinary excretion pattern. Spectrofluorimetric application on Lomeflox® tablets", Microchemical Journal , vol. 148, , pp. 419–423 , 2019.