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MN Saad, MS Mabrouk, H. M. Essam, E. S. Elzanfaly, and S. M. Amer, "A Two-Step Optimization Approach: Validated RP-HPLC Method for Determination of Gatifloxacin and Dexamethasone in Ophthalmic Formulation", Journal of Chromatographic Science, vol. 58, no. 6, pp. 504-510, 2020. AbstractWebsite
Almalki, F. A., M. A. Motaleb, I. T. Ibrahim, R. S. A. Rizq, and E. S. Elzanfaly, "Radiosynthesis, chromatographic evaluation and biodistribution of [125I]iododobutamine as a radiotracer for myocardial perfusion imaging", Journal of Radioanalytical and Nuclear Chemistry, vol. 324, no. 2, pp. 459-466, 2020. AbstractWebsite
Motaleb, M. A., I. T. Ibrahim, A. R. S. Rizq, and E. S. Elzanfaly, "Preparation, chromatographic evaluation and biodistribution of 99mTc-procainamide as a radiopharmaceutical for heart imaging", Radiochim. Acta, 2016.
Heragy, M. O., A. A. M. Moustafa, E. S. Elzanfaly, and A. S. Saad, "A portable solid-state potentiometric sensor based on a polymeric ion-exchanger for the assay of a controversial food colorant (sunset yellow)", Analytical Methods, vol. 13, no. 41, pp. 4896-4903, 2021. AbstractWebsite
B. M. Ayoub, S. Mowaka, E. S. Elzanfaly, M. M. Elmazar, and S. A. Mousa, "Pharmacokinetic Evaluation of Empagliflozin in Healthy Egyptian Volunteers Using LC-MS/MS and Comparison with Other Ethnic Populations, by B. M. Ayoub, S. Mowaka, ", Scientific Reports, vol. 7 , issue 2583, pp. 2-9, 2017. scientific_reports_2017.pdf
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, 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.

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
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
Elzanfaly, E. S., M. N. Morkos, and N. K. Ramadan, "Development and validation of PCR, PLS and TLC densitometric methods for the determination of vitamins B1, B6 and B12 in pharmaceutical formulations", Pakistanian Journal of Pharmaceutical Sciences, vol. 23 , issue 4, pp. 409 - 415, 2010.
Elzanfaly, E. S., and H. A. Merey, "36) 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 , issue 2, pp. 8-15, 2017. captopril_2017.pdf