Publications

Export 182 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 
N
Ibrahim, M. M., K. M. Kelani, N. K. Ramadan, E. S. ElZanfaly, and S. Abdel-Atty, "Newly Developed Nano Sensitive Carbon Paste Electrode Modified with Silver Sulphadiazine and Zinc Oxide for Voltammetric Determination of Loperamide Hydrochloride in Pharmaceutical Formulation and in Human Plasma", Journal of The Electrochemical Society, vol. 169, no. 5: IOP Publishing, pp. 056507, 2022. Abstract
n/a
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.
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: Elsevier, pp. 419–423, 2019. Abstract
n/a
M
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
n/a
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
n/a
Heragy, M. O., A. A. M. Moustafa, E. S. ElZanfaly, W. A. Al-Shareef, and A. S. Saad, "Miniaturized solid-state sensor for inline monitoring of the microbial biodegradation of a biohazardous textile azo dye (Direct Red-81)", Talanta Open, vol. 6: Elsevier, pp. 100146, 2022. Abstract
n/a
Sedik, G. A., R. S. Abo Rizq, I. T. Ibrahim, E. S. Elzanfaly, and M. A. Motaleb, "Miniaturized chromatographic systems for radiochemical purity evaluation of 131I-Ferulic acid as a new candidate in nuclear medicine applications", Applied Radiation and Isotopes, vol. 167: Pergamon, pp. 109370, 2021. Abstract
n/a
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.
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.
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 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: Elsevier, pp. 132–142, 2016. Abstract
n/a
L
Elzanfaly, E. S., and H. A. Merey, "A liquid chromatography/tandem mass spectrometric method for determination of captopril in human plasma: Application to a bioequivalence study", Journal of Applied Pharmaceutical Science, vol. 7, no. 2, pp. 008–015, 2017. Abstract
n/a
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
Tourism