| Use of charge-transfer complexation in the spectrophotometric analysis of certain cephalosporins GA Saleh, HF Askal, MF Radwan, MA Omar Talanta 54 (6), 1205-1215, 2001 | 158 | 2001 |
| Spectroscopic analytical study for the charge-transfer complexation of certain cephalosporins with chloranilic acid GA Saleh, HF Askal, IA Darwish, ANA El-Shorbagi Analytical Sciences 19 (2), 281-288, 2003 | 125 | 2003 |
| Simple fluorimetric method for determination of certain antiviral drugs via their oxidation with cerium (IV) IA Darwish, AS Khedr, HF Askal, RM Mahmoud Il Farmaco 60 (6-7), 555-562, 2005 | 99 | 2005 |
| Colourimetric and AAS determination of cephalosporins using Reineck's salt H Salem, H Askal Journal of Pharmaceutical and Biomedical Analysis 29 (1-2), 347-354, 2002 | 91 | 2002 |
| Selective spectrophotometric method for the determination of ascorbic acid in pharmaceutical preparations and fresh fruit juices EY Backheet, KM Emara, HF Askal, GA Saleh Analyst 116 (8), 861-865, 1991 | 76 | 1991 |
| Enantioselective binding analysis of verapamil to plasma lipoproteins by capillary electrophoresis–frontal analysis NAL Mohamed, Y Kuroda, A Shibukawa, T Nakagawa, S El Gizawy, ... Journal of Chromatography A 875 (1-2), 447-453, 2000 | 73 | 2000 |
| Utility of certain π-acceptors for the spectrophotometric determination of some penicillins HF Askal, GA Saleh, NM Omar Analyst 116 (4), 387-390, 1991 | 63 | 1991 |
| Selective spectrophotometric determination of ascorbic acid in drugs and foods OH Abdelmageed, PY Khashaba, HF Askal, GA Saleh, IH Refaat Talanta 42 (4), 573-579, 1995 | 53 | 1995 |
| New spectrophotometric methods for determination of captopril bulk drug and tablets HF Askal Talanta 38 (10), 1155-1158, 1991 | 51 | 1991 |
| Binding analysis of nilvadipine to plasma lipoproteins by capillary electrophoresis-frontal analysis NAL Mohamed, Y Kuroda, A Shibukawa, T Nakagawa, S El Gizawy, ... Journal of pharmaceutical and biomedical analysis 21 (5), 1037-1043, 1999 | 49 | 1999 |
| Frontal analysis of drug–plasma lipoprotein binding using capillary electrophoresis T Ohnishi, NAL Mohamed, A Shibukawa, Y Kuroda, T Nakagawa, ... Journal of pharmaceutical and biomedical analysis 27 (3-4), 607-614, 2002 | 48 | 2002 |
| Spectrophotometric study of the charge transfer complexes of some pharmaceutical butyrophenones HF Askal Talanta 44 (10), 1749-1755, 1997 | 42 | 1997 |
| Spectrophotometric determination of certain local anaesthetics in pharmaceutical preparations GA Saleh, HF Askal Analytical letters 28 (15), 2663-2671, 1995 | 41 | 1995 |
| Spectrophotometric determination of tetracycline and oxytetracycline in pharmaceutical preparations KM Emara, HF Askal, GA Saleh Talanta 38 (11), 1219-1222, 1991 | 40 | 1991 |
| Spectrophotometric determination of amlodipineand nicardipine in pharmaceutical formulations viabinary complex formation with eosin Y SM Derayea, HF Askal, OH Abdel-Megeed, MA El Hamd Journal of Applied Pharmaceutical Science, 84-89, 2012 | 36 | 2012 |
| Spectrophotometric and spectrofluorimetric determination of 1, 4-dihydropyridine drugs using potassium permanganate and cerium (IV) ammonium sulphate HF Askal, OH Abdelmegeed, M Abo El-Hamd Bulletin of Pharmaceutical Sciences. Assiut 33 (2), 201-215, 2010 | 34 | 2010 |
| Adsorptive square wave voltammetric determination of the antiviral drug valacyclovir on a novel sensor of copper microparticles–modified pencil graphite electrode GA Saleh, HF Askal, IH Refaat, AH Naggar, FAM Abdel-aal Arabian Journal of Chemistry 9 (1), 143-151, 2016 | 33 | 2016 |
| Evaluation of N-bromosuccinimide as a new analytical reagent for the spectrophotometric determination of fluoroquinolone antibiotics H Askal, I Refaat, I Darwish, M Marzouq Chemical and Pharmaceutical Bulletin 55 (11), 1551-1556, 2007 | 33 | 2007 |
| Application of inorganic oxidants to the spectrophotometric determination of ribavirin in bulk and capsules IA Darwish, AS Khedr, HF Askal, RM Mohamed Journal of AOAC International 89 (2), 341-351, 2006 | 31 | 2006 |
| Use of p-benzoquinone for the spectrophotometric determination of certain sulphonamides AMI Mohamed, HF Askal, GA Saleh Journal of pharmaceutical and biomedical analysis 9 (7), 531-538, 1991 | 28 | 1991 |
