Publications

Export 21 results:
Sort by: Author [ Title  (Desc)] Type Year
A B C D E F G H [I] J K L M N O P Q R S T U V W X Y Z   [Show ALL]
I
Elzanfaly, E. S., E. A. Amer, S. A. Galal, and H. E. Zaazaa, ISSN 0975-413X CODEN (USA): PCHHAX, , Submitted. Abstract
n/a
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.

Ramadan, N. K., K. M. Kelani, M. M. Ibrahim, E. S. Elzanfaly, Abdel-Rahman, and K. Mohamed, Ion Selective Membrane Electrodes for the Determination of Mixture of Analgin and Camylofin Dihydrochloride in their Pure Form and Combined Dosage Form, : UNIV TEHRAN, FAC CHEMISTRY, 2017. Abstract
n/a
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
n/a
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
n/a
, "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.

Elzanfaly, E. S., and M. Nebsen, "Ion selective membrane electrodes for stability indicating determination of benoxinate hydrochloride in pure form and in drug product", Anal Bioanal. Electochem, vol. 5, no. 2, pp. 166–177, 2013. Abstract
n/a
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.
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
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, pp. 401–414, 2015. Abstract
n/a
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.
Bassuoni, Y. F., E. S. Elzanfaly, H. A. M. Essam, H. E. Zaazaa, E. S. Elzanfaly, and H. M. Allah Essam, "Ion selective electrode approach for in-line determination of benzydamine hydrochloride in different matrices of pharmaceutical industry", Analytical& Bioanalytical Electrochemistry, vol. 9, no. 1, pp. 65–79, 2017. Abstract
n/a
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: IOP Publishing, pp. 017504, 2021. Abstract
n/a
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
n/a
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.
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: Elsevier, pp. 244–254, 2016. Abstract
n/a
Sedik, G., M. Mostafa, N. AbdelAllah, and E. Elzanfaly, "Integrated Analytical Techniques to Investigate the Effect of the Freezing/Thawing Cycles on the Non-Replicating Recombinant Chimpanzee Adenovirus Viral Vector Covid-19 Vaccine", Thawing Cycles on the Non-Replicating Recombinant Chimpanzee Adenovirus Viral Vector Covid-19 Vaccine, Submitted. Abstract
n/a
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.
Elzanfaly, E. S., S. A. Hassan, M. Y. Salem, and B. A. El-Zeany, "In-line potentiometric monitoring of dissolution behavior of verapamil hydrochloride versus traditional pharmacopeial method: A comparative study", Sensors and Actuators B: Chemical, vol. 228: Elsevier, pp. 587–594, 2016. Abstract
n/a
Tourism