1. A.I.H. Omer and E.A. Gad Kariem, and R.B. Salama. Separation and semi-quantitative determination of tetracycline degradation products in tetracycline hydrochloride powdersand capsules by thin-layer chromatography, J.Chromatogra., 205, 486(1981).
2. Mohamed E. Mohamed, El Rasheed A. Gad-kariem and Hassan Y. Aboul-Enein, Polarographic Determination of Butorphanol Tartrate, Intern. J. Environ. Anal. Chem., 16, 197 (1983).

3. Mohamed E. Mohamed, Hassan Y. Aboul-Enein and ELrasheed A. Gad-kariem, Potentiometric and visual titrimetric methods for analysis of captopril and its pharmaceutical forms, Analytical Letters, 16, 45(1983).
4. Abdel-Aziz M. Wahabi, Mohamed E. Mohamed, El-Rasheed A. Gad-Kariem, and Hassan Y. Aboul-Enein, Colorimetric, spectrophotometric and fluorimetric determination of prenalterol hydrochloride, Analyst, 108, 886(1983).
5. Mohamed E. Mohamed, Abdel-Aziz M. Wahabi and Elrasheed A. Gad-Kariem, Colorimetric and polarographic methods of analysis for prenalterol hydrochloride, Analytical Letters, 16, 1545 (1983).
6. Abdel-Aziz M. Wahabi, Mohammad Abounassif and El-Rasheed A. Gad-Kariem, Spectrophotometric Determination of Piperazine with Chloranil, Analyst, 109, 1513(1984).
7. Mohamed E. Mohamed, Abdel-Aziz M. Wahabi, El-Rasheed A. Gad-Kariem, andMahoud

M.A. Hassan, Rapid differential pulse polarographic determination of tiaprofenic acid, J. Assoc. Off. Anal. Chem., 67, 684 (1984).

8. A.M. Wahbi, M.E. Mohamed, M. Abounassif and E. Gad-Kariem. Spectrophotometricmethod of determination for cycloserine using chloranil, Analytical Letters, 18, 261(1983).
9. A.M. Wahbi, M.A. Abounassif, H.A. El-Obeid, E.A. Gad-Kariem, Spectrophotometric determination of pirenzepine dihydrochloride using ΔA method, Il Farmaco, 40, 334(1985).
10. A.M. Wahbi, H.A. El-Obeid, E.A. Gad-Kariem, Spectrophotometric determination of diethylcarbamazine citrate via charge-transfer complex. Il Farmaco, 41, 210(1986).
11. K.E.H. El Tahir, A.E. Ali, M.A. Abu Nasif, A.M. Ageel and E.A. Gadkariem, Theinfluence of oral hypoglycaemic sulfonyl urea on prostacyclin release by the rat thoracic aorta, Arch. Internationales Phamacodynamic Therap; 283, 134(1986).
12. Abdel-Aziz M. Wahabi, Mohammad A. Abounassif and E.A. Gad-kariem, Colorimetric determination of piperazine with p-benzoquinone, Talanta, 33, 179,(1986).
13. Abdel-Aziz M. Wahabi, Mohammad A. Abounassif and El-Rasheed A. Gad-Kariem. High- performance liquid chromatographic determination of strychnine and brucine in nux vomica liquid extract. Arch.Pharm. Chem., 15, 87(1987).
14. Abdel-Aziz M. Wahabi, Mohammad A. Abounassif, El-Rasheed A. Gad-Kariem andHassan

Y. Aboul-Enein, Spectrophotometric and fluorimetric determination of nomifensine meleate.

Talanta, 34, 287 (1987).

5. Mohammad A. Abounassif, El-Rasheed A. Gad-Kariem and Hassan Y. Aboul-Enein, High- performance liquid chromatographic determination of clobazam and one of its pharmaceutical formulation, J. Pharm. Biomed. Anal., 5, 431(1987).
6. Abdel-Aziz M. Wahabi, Mohammad A. Abounassif, El-Rasheed A. Gad-Kariem and Mahoud E. Ibrahim, Liquid Chromatographic Determination of Cinnamic and Benzoic Acids in Bezoin Preparations. J. Assoc. Off. Anal. Chem., 70, 689(1987).
7. K.E.H. El Tahir, E.A. Hamad, A.M. Ageel, M.A. Abu Nasif and E.A. Gadkariem, Effects of sesame and cod liver oils on prostacyclin synthesis by the rat thoracic aorta, Arch. Internationales Phamacodynamic Therap; 292, 182(1988).
8. Abdel-Aziz M. Wahabi, Mohammad A. Abounassif, El-Rasheed A. Gad-Kariem and Mahoud E. Ibrahim, Determination of aztreonam and L-arginine combination inparenteral formulation, J. Assoc. Off. Anal. Chem., 71, 31(1988).
9. Abdulrahman M. Al-Obaid, Mohamed E. Mohamed and El-Rasheed A. Gad-Kariem, PMR spectrometric analysis of tolmetin sodium in capsules forms, Spec. Lett., 22, 269(1989).
10. K.E.H. El-Tahir, E.A. Hamad, A.M. Ageel, M.A. Abu Nasif and E.A. Gadkariem, Influence of tea and coffee beverages on prostacyclin synthesis by the rat thoracic aorta, Prostaglandins Leukotrienes Essential Fatty Acids, 40 , 63(1990).
11. M.A. Abounassif, E.A. Gadkariem, and A.M. Wahabi, High performance liquid chromatographic determination of kheliin. Phenobarbitone and dipyrone combination in tables, Il Farmaco, 45, 465(1990).
12. M.A. Abounassif, E.M. Abdel-Moety and E.A. Gadkariem, HPLC quantification of azintamide and papaverine hydrochloride simultaneously in pharmaceutical preparations, J. Liquid Chromatogr. 13, 2689(1991).
13. M.A. Abounassif, M.E.M. Hagga, E.A. Gadkariem, and M.E Al-Awady, First-derivative UV spectrometric determination of sulphametrole and trimethoprim mixture in tablets, Acta Pharm. Jugosl., 41, 223(1991).
14. M.A. Abounassif, M.E.M. Hagga, E.A. Gadkariem, and M.E Al-Awadi, Simultaneous quantification of sulphametrole and trimethoprim mixture by high- performance liquid chromatography and UV-spectrophotometry using least squares, Acta Pharmaceutical Fennica, 101, 51(1992).
15. M.A. Abounassif, E.M. Abdel-Moety and R.A. Gadkariem, HPLC quantification of dietylamine salicylate and methyl nicotinate in ointments, J. Liq. Chromatogr., 15, 625(1992).

6. A.A Allhaider, M.E.M. Hagga, M.E. Alawady and E.A. Gad-kariem, Spectrophotometric determination of fluvoxamine in tablets based on charge-transfer complex with chloranil, Analytical Lett., 26, 887(1993).
7. Mohamed E.M. Hagga, Abdulqader A. Alhaider, Hamad A. Al-Khamees, Mahmoud E. Alawady and El-Rasheed A, Gad-Kariem, Evaluation of fluvoxamine meleate in tablets by high- performance liquid chrom autographic and charge-transfer complexation methods, Saudi Pharm. J., 1, 70(1993).
8. Ezzat M. Abdel-Moety, Mohammad A. Abounassif, El-Rasheed A, Gad-Kariem andNahaat
   1. Khattab, Simultaneous determination of amoxicillin and dicloxacillin in capsules by potentiometric titrimetry and high-performance liquid chromatography, Talanta, 40, 811(1993).
9. Ezzat M. Abdel-Moety, Mohammad Abdullah Abounassif, Al-Rasheed AhmadGad-Kariem, and Nahaat Abdel-Majeed Khattab, Quantification of ammidin and ammoidin in pharmaceutical preparations by high performance liquid chromatography and derivative spectrometry, Saudi Pharm. J., 1, 22(1993).
10. A.A. Mustafa, K.A. Al-Rashood, M.E.M. Hagga, E.A. Gad-Kariem and M.E. Al-Awady, High performance liquid chromatographic and polarographic methods for quantification of nicardipine hydrochloride in capsules. Pak. J. Sci. Ind. Res., 37, nos. 1-2(1994).
11. H.A. Al-Khamees, F.S. El-Shafie, M.E.M. Hagga, M.E. Alawady and E.A. Gad-Kariem, Kinetic method for the quantification of ampicillin trihydrate in bulk and in drugformulations. Scientica Pharmaceutica, 63, 191(1995).
12. H.A. Al-Khamees, M.A. Abounassif, E.A. Gad-Kariem, and H.A. Kandil, Simultaneous determination of ampicillin and cloxacillin in presence of their degradation products, either in binary mixtures or in pharmaceutical formulations. Saudi Pharm. J., 3, 104(1995).
13. F.S. El-Shafie, E.A. Gad-Kariem, K.A. Al-Rashood, H.A. Al-Khamees, and H.A. El-Obeid, Colorimetric method for the determination of ampicillin and amoxicillin, Analytical Lett., 29, 381(1996).
14. M.E.M. Hagga, M.A. Abounassif, M.I. Alwady, and E.A. Gad-Kariem, Kinetic study of the degradation of dicloxacillin in aqueous media, Boll.Chim. Farmaceutico, 136, 12(1997).
15. Abdul-Rahman M. Al-Obaid, Ezzat M. Abdel-Moety and Al-Rasheed A. Gad-Kariem, Photochemical studies on drug. 3. Photosability-indicating HPLC-method for determinationof thioridazine, Saudi Pharm. J., 5, 114(1997).

6. E.A. Gad-Kariem, and M.A. Abounassif, Determination of pentoxyverine in cough preparations by high performance liquid chromatography, J. Liq. Chrom. & Rel. Technol., 20, 3049(1997).
7. O.A. Al-Deeb, H.I El-Subbagh, E.M. Abdel-Moety and E.A. Gad-Kariem, Sability- indicating quantification of azintamide in dosage formulations, Scientica Pharmaceutica, 66,47 (1998).
8. H.A. El-Obeid, E.A. Gad-Kariem, , K.A. Al-Rashood, H.A. Al-Khamees, F.S. El-Shafieand

G.A.M. Bawazeer, A selective colorimetric method for the determination of penicillins and cephalosporins with α-aminoacyl functions, Analytical Lett., 32, 2809 (1999).

9. F. Belal, O.A. Al-Deeb, A.A. Al-Majed and E.A. R. Gad-Kariem, Voltammetric determination of N-nitrosoderivatives of atenolol and propranolol in simulated gastric juice, Il Farmaco, 54, 700(1999).
10. E.A. Gad-Kariem and M.A. Abounassif, Colorimetric determination of propofol inbulk form, dosage form and biological fluids, Analytical Lett., 33 (12), 2515(2000).
11. F. Belal, H.A. Al-Malaq, A.A. Al-Majed and E.A. GadKariem. A stability-indicating high performance liquid chromatographic method for the determination of isoxsuprine in dosage forms. Application to kinetic studies of isoxsuprine, J. Liq. Chromatogr. Relat. Technol., 23 (20), 3175(2000).
12. E.A. Gad Kariem, M.A. Abounassif, M.E. Hagga and H.A. Al-Khamees, Photodegradation kinetic study and stability-indicating assay of danazol using high performance liquid chromatography, J. Pharm. Biomed. Anal., 24, 335(2000).
13. F. Belal, I.A. Al-Zaagi, E.A. GadKariem and M.A. Abounassif, A stability-indicating high performance liquid chromatographic method for the simultaneous determination of ramipriland hydrochlorothiazide in dosage forms, J. Pharm. Biomed. Anal., 24, 335(2001).
14. H. Abdine, F. Belal, E.A. Gad Kariem and N.Zoman, Stability study of nilvadipine inbulk drug and pharmaceutical capsules by high-performance liquid chromatography, J. Liq. Chromatogr. Relat. Technol., 24 (20), 3213(2001).
15. E.A. Gad Kariem, F. Belal, M.A. Abounassif, H.A. El-Obeid and K.E.E. Ibrahim, Photodegradation kinetic study and stability-indicating assay of diloxanide furoate in dosage forms using high performance liquid chromatography, J. Liq. Chromatogr. Relat. Technol., 25(19), 2447(2002).

6. E.A. Gad Kariem, H.A. El-Obeid, M.A. Abounassif, S.M. Ahmed and K.E.E. Ibrahim, Effects of alkali and simulated gastric and intestinal fluids on danazol stability, J. Pharm. Biomed. Anal., 31, 743(2003).
7. E.A. Gad Kariem, F. Belal, M.A. Abounassif , H.A. El-Obeid and K.E.E. Ibrahim, Stability study on diloxanide furoate: effect of pH, temperature, gastric and intestinal fluids, IlFarmaco, 59, 323(2004).
8. Elrasheed Ahmed Gadkariem, Humeida Ali El-Obeid, Fathalla Belal, Mohammed Abdullah Abounassif and Kamal Eldin El-Tyeb Ibrahim, Chemical and photochemical stability studies on diloxanide furoate in carbohydrates and polyols solutions. J. Food Drug Anal., 12, 299(2004).
9. M.A. Abounassif, H.A. El-Obeid and E.A. Gad Kariem, Stability studies on some benzocycloheptane antihistaminic agents, J. Pharm. Biomed. Anal., 36, 1011(2005).
10. M. Al-Omar, A. AlMajed, M. Sultan, E.A. Gad Kariem and F. Belal, Voltammetric study of danazol and its determination in capsules and spiked biological fluids, J. Pharm. Biomed. Anal., 37, 199(2005).
11. I. Alsarra, M. Al-Omar, E.A. Gad Kariem and F. Belal, Voltammetric determination of montelukast sodium in dosage forms and human plasma, Il Farmaco, 60, 563(2005).
12. E.A.Gadkariem, H.A. Obeid, M.A.Abounassif and K.E.E. Ibrahim,Chemical and Photochemical Stability Studies on Danazol in Carbohydrates and Polyols Solutions.Presented at the 40th IUPAC congress. The proceedings conference, p. 767(2005).
13. Abdulrahman M. Al-Obaid, Hassan A-Afarag, Ashraf A. Khalil, Osman A. Al-Shabanah, Sami G. Abdel Hamida, Hassan A. El-kashef, Hassan S. Ahmed, Ahmed M. Al. Affifi, Elrasheed A. Gadkariem and Hussein I. El-Subbagh. Saudi Pharm. J., 14 (1),(2006).
14. E.A.Gadkariem, SM Abdelrazig and K.E.E- Ibrahim. Spectrophotometric Estimation of Captopril in Bulk and Dosage From. Omdurman Journal of Pharmaceutical Sciences, 1 (4), 397- 408(2008).
15. Suzan Zein Alabdeen Makawi, Saad Mohamed Hussein Ayoub and Elrasheed Ahmed Gadkariem, Determination of some Antioxidant Flavonoids in Bee Honey Samples Collected from Different Regions of Sudan. E. Journal of Chemistry.2009,6(s1),s429-2437.

56-E.A.Gadkariem ,k.E.E .ibrahim*,N.A.A.kamil, M.E.M.haga and H.A.El-Obeid A New Spectro photometric method For Determination of Methyldopa .Saudi Pharmaceutical journal , vol. 17,No.4 oct.2009

57 – Arbab1* , AHH; E1-imam2 , YMA and Gad kariem – Chormatographic andSpectroscopic Analysis of Anogeissus leiocarpus (DC.) Gill & Peer , Stem Bark Extracts ,Omdurman Journal of Pharmaceutical Sciences , vol. 1, NO 5, January 2009 ,pp562-666

58- Suzan Zein ALabdeen Makawi1, Mohammed Idrees Taha1, Badawi Ahmed Zakaria1, Babeker Siddig, Hazeim Mahmod1, Abedel Rahim Mohamed Elhussein1 and Elrasheed Ahmed Gad kariem2* Identification and Quantification of 5-Hydroxymethyl Furfural HMF in Some Sugar-Containing Food Products by HPLC, Pakistan Journal of Nutrition 8 (9): 1391-1396, 2009

ISSN 1680-5194.

9. Elrasheed A.Gadkariem , Mohammed M.Mutasim , Kamal E. E. Ibrahim , Humeida A. El- Obied*Department of pharmaceutical Chemistry , Faculty of Pharmacy , University of Khartoum, Sudan;Department of Pharmaceutical chemistry , University of Medical Science and Technology , Sudan* Spectrophotometric Methods For The Determination Of Cefprozil In Bulk And Dosage Form   International Journal of Biomedical Science Sep 15,2009267-274
10. E.A. Gadkariem, R.M. AL-Ashban, L.B. Babikir and H.I AL-Joher. Toxicity study of Korean Ginseng Herbal medicine. Research Journal of Pharmacology 4 (4): 86-90,2010.
11. S.W. SHANTIER, E. A. GADKARIEM, K. E. IBRAHIM, H. A. EL-OBEID. Department of Pharmaceutical Chemistry,Faculty of Pharmacy,University of Khartoum, Sudan, SUDAN, *. Department of Pharmaceutical Chemistry, University of Medical Sciences and Technology, Sudan* Spectrophotometric Determination of Cefadroxil in Bulk and Dosage forms Using Sodium Hydroxide. E-Journal of Chemisry.8(3),1314-1322,2011.

2. E.A.Gadkariem, R.M. Al-Ashban, L.B. Babikir and H.i. Al-Johr* Faculty of Pharmacy, University of Khartoum, Sudan, Drug Laporatories, Food and Drug Authority, Saudi Arabia*Toxicity Studies of Victoria Capsules Herbal Medicine. Researsh Journal of Pharmacology.5(3):35-39.2011
3. Shaza Wagieallah Shantier, Elrasheed Ahmed Gadkariem , Kamal Aldin Eltayeb Ibrahim*Department of pharmaceutical chemistry, Faculty of Pharmacy , University of Khartoum , Sudan*A Colorimetric method for the determination ofTobramycin*International Journal of Drug Formulation and research*IJDFR volume 2 Issue 4,July-Aug.2011(260-272)
4. W. A. Shadoul, E.A Gad Kariem, M.E. Adam and K.E.E Ibrahim*Department of Pharmaceutical Chemistry , University of Khartoum, Khartoum, Sudan*Simultaneous Determination of Dorzolamide hydrochloride and Timolol maleate in Opthalmic solutions using HPLC*Elixir Pharmacy 4060-4063 .382011
5. W .A. Shadoul, E.A.Gad Kariem, M.E. Adam, K.E.E. Ibrahim*Department of pharmaceutical Chemistry, University of Khartoum, Khatoum,Sudan*Simultaneous

determination of Dexamethasone Sodium Phosphate and Chloramphenicol in Opthalmic solutions*International journal of chemical science and technology Volume 1-Issue2.April 2011 pp. 60-69

6. Shaza Wagiealla Shantier, Elrasheed Ahmed Gadkariem, Kamal Eldin Ibrahim and Mohammed Elzain Hagga. *Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Khartoum *Kinetic Determination of Tobramycin in Drug Formulation* Research Journal of Pharmaceutical, Biological and Chemical Sciences, volume3 Issue 1, Jan-March (566- 573)2012.
7. Rehab Salih Mahmoud abdalla, Alsheikh Algilani Albasheer, Abdel Rahim Mohamed Elhussein and Elrasheed Ahmed Gadkariem,* Ministry of Science and Technology, Central Lab, Khartoum, Sudan. Department of Chemistry, Faculty of Science, University of Alzaiemalazhari. Alribat National University, Faculty of Pharmacy, Khartoum Sudan. * Physico-chemical Characteristics of Date Seed Oil Grown in Sudan, American journal of applied Sciences, 9(7):933-999,2012.
8. W .A. Shadoul, E.A.Gad Kariem, M.E. Adam, K.E.E. Ibrahim*Department of pharmaceutical Chemistry, University of Khartoum, Khatoum, Sudan*Simultaneous determination of Antazoline hydrochloride and Tetrahydrozoline hydrochloride in Opthalmic solutions using HPLC. International Journal of Drug Formulation andResearch.2012.
9. E.A.Gadkariem, M.A.Mohamed and M.A.Jabbir, *Department of PharmaceuticalChemistry, Faculty of Pharmacy, University of Khartoum* Spectrophotometric Determination of Tranexamic acid in Bulk and Dosage Forms using Ascorbic Acid Journal of Analytical Technique2012.
10. Elrasheed A.Gadkariem, Magdi A.Mohamed and Maha A.A. Jabbir, *Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Khartoum*Spectrophotometric Determination of Tranexamic acid in Bulk and Dosage Forms, World Applied Science Journal.2012.
11. Riham M. Omer, Elrasheed A.Gadkariem, Magdi A.Mohamed and Kamal E.Ibrahim,

*Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Khartoum* Kinetic method for Determination of Dopamine HCl in Bulk and Injectable Forms. International journal of Chemical Science and Technology, Volume 2 Issue 3, 218-223. 2012

2. 71. Riham M. Omer, Elrasheed A.Gadkariem, Magdi A.Mohamed and Kamal E.Ibrahim,

*Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Khartoum* Development of Spectrophotometric method for Determination of Dopamine HCl in Bulk and Injectable Forms. Research Journal of Pharmaceutical, Biological and Chemical Sciences, Volume 3 Issue 4.2012

3. E.A.Gadkariem, M.A.Jabbir, Assay of Tranaxamic acid via coupling with Ascorbic acid using kinetic methods. Elixir pharmacy, 54: 12331 – 12334, 2013.
4. E.A.Gadkareem, M.A. Mohamed and M.A.Jabbir , Kinetic studies on the coupling reaction between Tranexamic acid and 2,6-dichloroquinine-4-chlorimide, Advances in pharmacy and pharmacology, 1(1): 1-7,2013.
5. Shaza Wagiealla Shantier, Elrasheed Ahmed Gadkareem, Spectrophotometric and HPLCmethods for the determination of Cefquinome Sulphate in Bulk and Dosage forms. Elixir pharmacy,59:

15471-15473, 2013.

6. Shaza W. Shantier, Elrasheed Ahmed Jadkariem, Mohamed O. Adam and MagdiA.Mohammed*, Development of Stability- Indicating Methods for Cefquinome Sulphate. International journal of Biomedical Sciences, 9(3),2013
7. Babikir *RSA; El-imam YMA; Khalid HA; Gadkariem E.A., Antimicrobial activity and chromatographic assessment of Guiera senegalensis leaves extract. Ribat Journal of MedicalSciences (RJMS),vol(3)2013.
8. Latifa Bashir Babiker, Elrasheed Ahmed Gadkariem, Riyadh Mohammed Alashban, Haya Ibrahim Aljohar, Quality assessment of Victoria 1500 and 2000 capsules a herbal drug product,Elixir pharmacy 63(2013)18134-18140.
9. Shaza Wagiealla Shantier, Elrasheed Ahmed Gadkariem, Differential spectrophotometric methods for determination of Cefquinome Sulphate, Britich journal of Pharmaceutical Research, (under puplication).
10. Hala Abdalla Imam, Elrasheed Ahmed Gadkariem, Effect of real storage conditions on stability of Dexamethasone formulations marketed in Sudan. Ribat Journal of Medical Sciences (RJMS), under puplication.