[1] | Sensitive spectrofluorimetric and spectrophotometric methods for the determination of thonzylamine hydrochloride in pharmaceutical preparations based on coupling with dimethylbarbituric acid in presence of dicyclohexylcarbodiimide. Suzy M. Sabry, Mohamed H. Abdel-Hay, Magda H. Barary and Tarek S. Belal; J. Pharm. Biomed. Anal., 22(2), 257-264, (2000). |
[2] | Spectrofluorimetric determination of 2-aminopyridine as a potential impurity in piroxicam and tenoxicam within the pharmacopoeial limit. Magda H. Barary, Mohamed H. Abdel-Hay, Suzy M. Sabry and Tarek S. Belal; J. Pharm. Biomed. Anal., 34(1), 221-226, (2004). |
[3] | Adsorptive stripping voltammetric behaviour of azomethine group in pyrimidine-containing drugs. Suzy M. Sabry, Magda H. Barary, Mohamed H. Abdel-Hay and Tarek S. Belal; J. Pharm. Biomed. Anal., 34(3), 509-516, (2004). |
[4] | Spectrophotometric Determination of Bisacodyl and Piribedil. Mohamed H. Abdel-Hay, Suzy M. Sabry, Magda H. Barary and Tarek S. Belal; Anal. Lett., 37(2), 247-262, (2004). |
[5] | Simultaneous determination of cinnarizine and domperidone maleate using H-point standard additions method, derivative and derivative-ratio spectrophotometry. Azza A. Gazy, Ekram M. Hassan, Mohamed H. Abdel-Hay and Tarek S. Belal; Bull. Fac. Pharm. Cairo Univ., 44(2), 175-184, (2006). |
[6] | Simultaneous determination of hydrochlorothiazide and timolol Maleate in binary mixture using zero-crossing derivative and derivative–ratio spectrophotometry. Ekram M. Hassan, Azza A. Gazy, Mohamed H. Abdel-Hay and Tarek S. Belal; Bull. Fac. Pharm. Cairo Univ., 44(2), 185-193, (2006). |
[7] | Differential pulse cathodic voltammetric determination of floctafenine and metopimazine. Azza A. Gazy, Ekram M. Hassan, Mohamed H. Abdel-Hay and Tarek S. Belal; J. Pharm. Biomed. Anal., 43(4), 1535-1539, (2007). |
[8] | High Performance Liquid Chromatographic Determination of Proquazone and Its m-Hydroxy Metabolite in Spiked Human Plasma and Urine. Ekram M. Hassan, Azza A. Gazy, Mohamed H. Abdel-Hay and Tarek S. Belal; J. AOAC Int., 90(4), 971-976, (2007). |
[9] | Kinetic Spectrophotometric Analysis and Spectrofluorimetric Analysis of Ciprofloxacin Hydrochloride and Norfloxacin in Pharmaceutical Preparations Using 4-Chloro-7-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl). Mohamed H. Abdel-Hay, Ekram M. Hassan, Azza A. Gazy and Tarek S. Belal; J. Chin. Chem. Soc., 55(4), 818-827, (2008). |
[10] | Derivative and Derivative Ratio Spectrophotometric Analysis of Antihypertensive Ternary Mixture of Amiloride Hydrochloride, Hydrochlorothiazide and Timolol Maleate. Mohamed H. Abdel-Hay, Azza A. Gazy, Ekram M. Hassan and Tarek S. Belal; J. Chin. Chem. Soc., 55(5), 971-978, (2008). |
[11] | Selective and Stability-Indicating Methods for the Simultaneous Determination of Mexiletine Hydrochloride and/or Its Related Substance: 2,6-Dimethylphenol. Tarek S. Belal, Rim S. Haggag and Rasha A. Shaalan; J. AOAC Int., 91(4), 720-730, (2008). |
[12] | A Simple and Sensitive Spectrofluorimetric Method for Analysis of Some Nitrofuran Drugs in Pharmaceutical Preparations. Tarek Saied Belal; J. Fluoresc., 18(5), 771-780, (2008). |
[13] | GC–MS studies on acylated derivatives of 3-methoxy-4-methyl-and 4-methoxy-3-methyl-phenethylamines: Regioisomers related to 3,4-MDMA. Tarek Belal, Tamer Awad, Jack DeRuiter and C. Randall Clark, Forensic Science International, 178(1), 61-82, (2008). |
[14] | GC-IRD Methods for the Identification of Isomeric Ethoxyphenethylamines and Methoxymethcathinones. Tarek Belal, Tamer Awad, Jack DeRuiter and C. Randall Clark; Forensic Science International, 184(1-3), 54-63, (2009). |
[15] | Comparison of GC-MS and GC-IRD methods for the differentiation of methamphetamine and regioisomeric substances. Tamer Awad, Tarek Belal, Jack DeRuiter, Kevin Kramer and C. Randall Clark; Forensic Science International, 185(1-3), 67-77, (2009). |
[16] | GC and Mass Spectral Studies on Acylated Side Chain Regioisomers of 3-Methoxy-4-methyl-phenethylamine and 4-Methoxy-3-methyl-phenethylamine. Tamer Awad, Jack DeRuiter, Tarek Belal and C. Randall Clark; J. Chromatogr. Sci., 47(4), 279-286, (2009). |
[17] | GC-MS Evaluation of a Series of Acylated Derivatives of 3,4-Methylenedioxymethamphetamine. Tarek Belal, Tamer Awad, C. Randall Clark and Jack DeRuiter; J. Chromatogr. Sci., 47(5), 359-364, (2009). |
[18] | Spectrophotometric, Spectrofluorimetric and Voltammetric Analyses of Naftidrofuryl Oxalate in its Tablets. Suzy M. sabry, Tarek S. Belal, Magda H. Barary and Mohammed E.A. Ibrahim; Int. J. Biomed. Sci., 5(3), 283-292, (2009). |
[19] | Determination of Paracetamol and Tramadol Hydrochloride in Pharmaceutical Mixture Using HPLC and GC-MS. Tarek Belal, Tamer Awad and C. Randall Clark; J. Chromatogr. Sci., 47(10), 849-854, (2009). |
[20] | Stability-Indicating Simultaneous Determination of Paracetamol and Three of Its Related Substances Using a Direct GC/MS Method. Tarek Belal, Tamer Awad and C. Randall Clark; J. AOAC Int., 92(6), 1622-1630, (2009). |
[21] | Kinetic Spectrophotometric Analysis of Naftidrofuryl Oxalate and Vincamine in Pharmaceutical Preparations Using Alkaline Potassium Permanganate. Tarek Saied Belal, Magda Hamdy Barary, Suzy Mohammed Sabry and Mohammed Elsayed Abdel-Latif Ibrahim; J. Food Drug Anal., 17(6), 415-423, (2009). |
[22] | GC-IRD Studies on Regioisomeric Ring Substituted Methoxy Methyl Phenylacetones Related to 3,4-Methylenedioxyphenylacetone. Tamer Awad, Tarek Belal, Jack DeRuiter and C. Randall Clark; Forensic Science International, 194(1-3), 39-48, (2010). |
[23] | Validated HPLC Determination of the Two Fixed Dose Combinations (Chlordiazepoxide Hydrochloride and Mebeverine Hydrochloride; Carvedilol and Hydrochlorothiazide) in Their Tablets. Rim S. Haggag, Rasha A. Shaalan and Tarek S. Belal; J. AOAC Int., 93(4), 1192-1200, (2010). |
[24] | HPLC-DAD Stability Indicating Determination of Nitrofurazone and Lidocaine Hydrochloride in Their Combined Topical Dosage Form. Rasha A. Shaalan and Tarek S. Belal; J. Chromatogr. Sci., 48(8), 647-653, (2010). |
[25] | GC-MS Studies on Side Chain Regioisomers Related to Substituted Methylenedioxyphenethylamines: MDEA, MDMMA and MBDB. Tamer Awad, Tarek Belal, Hadir M. Maher, Jack DeRuiter and C. Randall Clark; J. Chromatogr. Sci., 48(9), 726-732, (2010). |
[26] | Simultaneous Spectrofluorimetric Determination of Amlodipine Besylate and Valsartan in their Combined Tablets. Rasha A. Shaalan and Tarek S. Belal; Drug Test. Analysis, 2(10), 489-493, (2010). |
[27] | A Validated HPLC Method for the Simultaneous Determination of Vincamine and its Potential Degradant (Metabolite), Vincaminic Acid: Applications to Pharmaceutical Formulations and Pharmacokinetic Studies. Suzy Mohammed Sabry, Tarek Saied Belal, Magda Hamdy Barary, and Mohammed Elsayed Abdel-Latif Ibrahim; J. Food Drug Anal., 18(6), 447-457, (2010). |
[28] | Gradient HPLC-Diode Array Detector Stability-Indicating Determination of Lidocaine Hydrochloride and Cetylpyridinium Chloride in Two Combined Oral Gel Dosage Forms.Tarek S. Belal, Rasha A. Shaalan and Rim S. Haggag; J. AOAC Int., 94(2), 503-512, (2011). |
[29] | Gradient HPLC-DAD determination of the antihypertensive mixture of amlodipine besylate, valsartan and hydrochlorothiazide in their combined pharmaceutical tablets. Rasha A. Shaalan and Tarek S. Belal; Accepted for publication in Journal of Liquid Chromatography & Related Technologies. |
[30] | Gradient HPLC-DAD Stability Indicating Determination of Miconazole Nitrate and Lidocaine Hydrochloride in Their Combined Oral Gel Dosage Form. Tarek S. Belal and Rim S. Haggag; Accepted for publication in Journal of Chromatographic Science. |
[31] | A Validated HPLC Method for the Simultaneous Determination of Naftidrofuryl Oxalate and its Degradation Product (Metabolite), Naftidrofuryl Acid: Applications to Pharmaceutical Tablets and Biological Samples. Suzy Mohammed Sabry, Tarek Saied Belal, Magda Hamdy Barary, and Mohammed Elsayed Abdel-Latif Ibrahim; Submitted. |
[32] | HPLC-DAD Stability Indicating Determination of the Fixed-Dose Combination of Nifuroxazide and Drotaverine Hydrochloride in Capsules. Hadir M. Maher and Tarek S. Belal; Submitted. |
[33] | GC-IRD Studies on Ring Substituted Methoxy Methyl Methamphetamines Related to 3,4-Methylenedioxymethamphetamine. Tarek Belal, Tamer Awad, C. Randall Clark and Jack DeRuiter; Writing phase. |
[34] | Stability-indicating simultaneous determination of trimetazidine dihydrochloride and two of its related substances using direct GC-MS method. Tarek Belal, Tamer Awad and C. Randall Clark; Writing phase. |
[35] | HPLC-DAD Stability Indicating Determination of the Fixed-Dose Combination of Diclofenac sodium and Diflunisal in Their Combined Dosage Form. Rasha A. Shaalan and Tarek S. Belal; Writing phase. |
[36] | HPLC-DAD Determination of Two Pharmaceutical Mixtures Containing the Antihistamine Drug Ebastine. Rim S. Haggag and Tarek S. Belal; Writing phase. |