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E
Elzanfaly, E. S., N. N. Salama, R. M. Youssif, A. S. Fayed, H. A. M. Hendawy, and M. Y. Salem, "40) Zero and second‐derivative synchronous fluorescence spectroscopy for the quantification of two non‐classical β‐lactams in pharmaceutical vials: Application to stability studies", Luminescence, vol. 2017, pp. 1–11, 2017. luminesence_2017.pdf
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
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.

Elzanfaly, E. S., S. A. Hassan, M. Y. Salem, and B. A. El-Zeany, "Continuous Wavelet Transform, a powerful alternative to Derivative Spectrophotometry in analysis of binary and ternary mixtures: A comparative study", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , vol. 151, pp. 945–955, 2015.
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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Elzanfaly, E. S., A. S. Saad, and A. - E. B. Abd-Elaleem, "Combining the isoabsorptive point in the ratio spectrum and the smart ratio difference methods for a single step determination of compounds with overlapped spectra", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 95, pp. 188–192, 2012.
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., H. E. Zaazaa, A. T. Soudi, and M. Y. Salem, "Validated chiral chromatographic methods for clopidogrel bisulphate and its related substances in bulk drug and pharmaceutical dosage forms", Chemical Papers, vol. 69, issue 12, pp. 1541–1547, 2015.
Elzanfaly, E. S., and S. A. Abdel-Gawad, "Simultaneous quantification of ramipril, glimepiride and metformin in human plasma by ultra-performance liquid chromatography – tandem mass spectrometry", Journal of Applied Pharmaceutical Science , vol. 7, issue 7, pp. 62-69, 2017. metformin_2017.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 , issue 4, pp. 401-414, 2015. cetrimide_ise_2015.pdf
ElZanfaly, E. S., E. A. H. Amer, S. A. B. Galal, and H. E. Zaazaa, "Spectrofluorimetric determination of eptifibatide in human plasma and dosage form", Luminescence, vol. 34, pp. 64–69, 2019. elzanfaly_et_al-2019-luminescence.pdf
Elzanfaly, E. S., A. S. Saad, and A. - E. B. Abd-Elaleem, "A Novel Simple Method for Resolving Overlapped Spectral Data with A Wide Range of Applicability, and Its Application as a Stability Indicating Method for Determination of Tazarotene ", Pharmaceutica Anaytical Acta, , vol. 3, issue 3, pp. 153, 2012.
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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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-Rahman, M. A. K., Eman S. Elzanfaly, M. M. Ibrahim, and N. K. Ramadan, "43) Ion Selective Membrane Electrodes for the Determination of Mixture of Analgin and Camylofin Dihydrochloride in their Pure Form and Combined Dosage Form", Analytical & Bioanalytical Electrochemistry, vol. 9, issue 1, pp. 1-14, 2017. analgine_analytical_electro_2017.pdf
El-Bardicy, M. G., M. F. El-Tarras, and E. S. Elzanfaly, "Determination of phenytoin, phenobarbitone and methylphenobarbitone in combination.", Spectroscopy Letters, vol. 30, issue 2, pp. 267-287, 1998. Abstract

This work is concerned with the determination of a mixture of phenytoin, phenobarbitone and methylphenobarbitone by two Werent techniques. The first one depends on the simultaneous quantitative densitometric evaluation of thin layer chromatograms of the three drugs. The second is the application of quantitative 'H-NMR spectrometry for the simultaneous determination of phenobarbitone and methylphenobahiione in the presence of phenytoin, while phenytoin was determined in this
mixture by modifying the benzophenone spectrophotometric procedure

D
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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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.
B
Boltia, S. A., A. T. Soudi, E. S. Elzanfaly, and H. E. Zaazaa, "Simultaneous determination of paracetamol, orphenadrine citrate and caffeine ternary mixture by different spectrophotometric methods", Journal of Applied Spectroscopy, vol. 86, issue 4, pp. 1-9, 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, , pp. 419–423 , 2019.
Boltia, S. A., A. T. Soudi, E. S. Elzanfaly, and H. E. Zaazaa, "Development and Greenness Evaluation of a Potentiometric Method for Lomefloxacin Hydrochloride Determination in Urine and Establishment of Cumulative Excretion Pattern", Journal of The Electrochemical Society, vol. 166, issue 2, pp. B141-B146, 2019.
Boltia, S. A., A. T. Soudi, E. S. Elzanfaly, and H. E. Zaazaa, "Simultaneous Quantification of Chlorpheniramine, Phenylephrine, Guaifenesin in Presence of Preservatives with Detection of Related Substance Guaiacol in their Cough Syrup by RP-HPLC and TLC-Densitometric Methods ", Journal of Chromatographic Science, vol. 57, issue 6, pp. 552–559, 2019.
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