Bulletin of Faculty of Science, Zagazig University

Author = Ragaa elsheikh

Surface active ionic liquid‑assisted cloud point extraction method for preconcentration of nickel in environmental samples before its FAAS determination

Articles in Press, Accepted Manuscript, Available Online from 13 July 2020

Ayman A Gouda; Ragaa elsheikh; Eman M Hafez; Ibrahim S. Ali; Salih S Idris; Osama M. Salem

Preconcentration and spectrophotometric determination of mercury in water, food and hair samples through ionic-liquid induced micelle-mediated extraction

Articles in Press, Accepted Manuscript, Available Online from 13 July 2020

Ayman A Gouda; Ragaa elsheikh; Wafaa Hassan; Sara H Ibrahim; Amira Youssef

Evaluation of Trihalomethanes Formation Potential and Healthy Risks in Alexandria Governorate, Egypt

Articles in Press, Accepted Manuscript, Available Online from 12 August 2020

Dina Moustafa; Ragaa elsheikh; Ali Mahmoud

Ecofriendly spectrophotometric techniques for the determination of imeglimin hydrochloride in pharmaceutical formulations

Volume 2025, Issue 4, October 2025, Pages 126-136

Ayman A Gouda; Ragaa elsheikh; Asmaa S Abdelhamed; Mohamed A. Afify; Mona A El-Attar; Mahmoud Almasry

Simple and Sensitive Spectrophotometric Methods for Estimation of Vortioxetine HBr in Pharmaceutical Formulations

Volume 2025, Issue 3, July 2025, Pages 52-63

Ayman A Gouda; Ragaa elsheikh; Noha E.M. Elsaify; Nehal S.A. Soliman; Asmaa El Sayed; Ahmed Salah Eldien; Asmaa S Abdelhamed; Mohamed A. Afify

Heavy Metal Treatment in Wastewater: The Problem of Heavy Metal Pollution

Volume 2025, Issue 3, July 2025, Pages 82-104

Ayman A Gouda; Ragaa elsheikh; Bahig Atia; Mohamed A Gado; Ahmed Weshahy; Ahmad Amen

DEVELOPMENT AND VALIDATION OF STABILITY INDICATING RP-HPLC METHOD FOR SIMULTANEOUS DETERMINATION OF SIMVASTATIN AND FENOFIBRATE IN BULK AND DOSAGE FORM

Volume 2025, Issue 3, July 2025, Pages 134-146

Ayman A Gouda; Ragaa elsheikh; Ahmed Salah Eldien; Ahmed Sobhy Darwish

Simple validated approach to quantify valsartan and sacubitril in medications using liquid chromatography

Volume 2025, Issue 3, July 2025, Pages 216-229

Ahmed Sobhy Darwish; Ayman A Gouda; Ragaa elsheikh; Ahmed Salah Eldien

Utilization of charge transfer complexation reaction for spectrophotometric determination of dronedarone hydrochloride in pure and dosage forms

Volume 2025, Issue 2, June 2025, Pages 1-13

Ayman A Gouda; Ragaa elsheikh; Sameh Abdalla; Nessma M. Jumaa; Noha E.M. Elsaify; Nehal S.A. Soliman; Ahmed Ghazy; Asmaa El Said

Quantitative spectrophotometric determination of ivabradine hydrochloride in pharmaceutical formulations based on redox reaction using cerric(IV) ammonium sulphate

Volume 2025, Issue 2, June 2025, Pages 26-38

Ahmed A. Ghazy; Ayman A Gouda; Ragaa elsheikh; Sameh Abdalla; Nessma M. Jumaa; Noha E.M. Elsaify; Nehal S.A. Soliman; Asmaa El Said; Ahmed H. Moustafa

A comprehensive overview on the analytical techniques used for determination of moxifloxacin hydrochloride in pharmaceutical and biological matrices

Volume 2025, Issue 2, June 2025, Pages 95-118

Ayman A Gouda; Ragaa elsheikh; Moataz S. Mahmoud; Ahmed F Abdel Allem; Ahmed El Sayed; Nessma M. Jumaa; Noha E.M. Elsaify; Nehal S.A. Soliman; Asmaa El Sayed

Quantitative analytical methods for determination of gemifloxacin mesylate in different matrices: A review

Volume 2025, Issue 1, April 2025, Pages 86-101

Ayman A Gouda; Ragaa elsheikh; Moataz S. Mahmoud; Ahmed F Abdel Allem; Ahmed El Sayed; Ahmed Ghazy; Sameh Abdalla; Nessma M. Jumaa; Noha E.M. Elsaify; Nehal S.A. Soliman