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Sedik, G. A., S. A. Attya, F. A.Morsy, Doha M. Naguib, and hala Zazaa, "Validated Stability Indicating Chromatographic Methods for Quantification of Imidocarb Dipropionate; Application for the Determination of Its Residues in Bovine Meat and Milk Samples", Journal of AOAC INTERNATIONAL, vol. 103, issue 4, pp. 980-988, 2021.
Ali, N. W., S. S.Abbas, H. E. - S. Zaazaa, M. M. Abdelrahaman, and M. A. Kawy, "Validated Stability Indicating methods for determination of nitazoxanide in presence of its degradation products", Journal of Pharmaceutical Analysis , vol. 2, issue 2, pp. 104-115, 2012.
Hegazy, M., A. Kessiba, A. E. Elgindy, and M. A. Kawy, "Validated stability indicating RP-HPLC for quantitation of nitazoxanide in presence of its alkaline degradation products and their characterization by HPLC-tandem mass spectrometry", Journal of chromatographic science, vol. 52, issue 9: Oxford University Press, pp. 1071-1081, 2014. Abstract
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Hegazy, M., A. Kessiba, A. E. El Gindy, and M. Abdelkawy, "Validated Stability Indicating RP-HPLC for Quantitation of Nitazoxanide in Presence of Its Alkaline Degradation Products and Their Characterization by HPLC-Tandem Mass Spectrometry.", Journal of chromatographic science, vol. 52, issue 9, pp. 1071-1081, 2014. Abstractamira_master_jcs.pdf

A simple and sensitive stability indicating HPLC method was developed and validated for quantitative determination of Nitazoxanide (NTZ), a new antiprotozoal drug, in presence of degradation products generated under forced alkaline hydrolysis. Chromatographic separation was achieved on Inertsil C8-3 column (150 × 4.6 mm i.d.) using a mobile phase composed of acetonitrile: 50 mM ammonium acetate buffer (50:50, v/v, pH 5.0 adjusted with acetic acid) at a flow rate of 1 mL/min. Quantification was achieved with UV detection at 298 nm based on relative peak area. The method was linear over the concentration range of 0.8-50 µg/mL (r = 0.9999) with a limit of detection and quantification 0.0410 and 0.1242 µg/mL, respectively. The developed method has the requisite accuracy, selectivity, sensitivity and precision to assay NTZ in presence of its degradation products either in bulk powder or in pharmaceutical formulations. The degradation products were then identified by HPLC-MS/MS analysis using an electrospray ionization source and an ion trap analyzer.

Rezk, M. R., and I. A. A. Karim, "A validated stability indicating RP-LC method for determination of moxifloxacin in bulk powder and in pharmaceutical formulations", Analytical Chemistry, An Indian Journal, vol. 12, issue 12, pp. 461-466, 2013.
M.Lotfy, H., S. M.Tawakkol, N. M.Fahmy, and M. A.Shehata, "Validated Stability Indicating Spectrophotometric Methods for theDetermination of Lidocaine Hydrochloride, Calcium Dobesilate, and Dexamethasone Acetate in their Dosage Forms", Analytical Chemistry Letters, vol. 3, issue (3), pp. 208-225, 2013.
Salem, M. Y., N. N. Salama, undefined, and A. L. E. Fattah, "Validated stability-indicating chromatographic methods for the determination of veralipride in presence of its degradation products", Chromatographia, vol. 70, issue 7-8, pp. 1299-1302, 2009.
Hassib, S. T., A. A. El-Zaher, and M. A. Fouad, "Validated Stability-Indicating Derivative and Derivative Ratiomethods for the Determination of some Drugs used to Alleviate Respiratory Tract Disorders and their Degradation Productstract Disorders and their Degradation Products", Drug Testing and Analysis, 2011. Abstract

Derivative and derivative ratio methods are presented for the determination of butamirate citrate, formoterol fumarate, montelukast sodium, and sodium cromoglycate. Using the second derivative ultraviolet (UV) spectrophotometry, butamirate citrate and formoterol fumarate were determined by measuring the peak amplitude at 260.4 and 261.8 nm, respectively, without any interference of their degradation products. Butamirate citrate degradation product, 2-phenyl butyric acid, was determined by themeasurement of its second derivative amplitude at 246.7nmwhere butamirate citratedisplays zero crossing. Formoterol fumarate degradation product, desformyl derivative, could be evaluated through the use of the first derivative at peak amplitude of 264.8 nm where interference of formoterol fumarate is negligible. In the first mode, the zero-crossing technique was applied at 305 nm for the determination of montelukast sodium in the presence of its photodegradation product, cis-isomer. The derivative of ratio spectra of montelukast sodium and its cis- isomer were used to determine both isomers using the first derivative of the ratio spectra by measuring the amplitudes of the trough at 305 nm and the peak at 308 nm, respectively. The later technique was also used for the determination of a ternary mixture of sodium cromoglycate and its two degradation products using zero-crossing method. In the derivative ratio spectra of the ternary mixture, trough depths were measured at 271.6, 302.8 and 302.2 nm, using the second, the first, and the second mode to evaluate sodium cromoglycate, degradation product (1) and degradation product (2), respectively. All the methodswere applied successfully to the pharmaceutical preparation and were validated according to ICH guidelines.

Lotfy, H. M., M. R. Rezk, A. M. Michael, A. O. S. El-Kadi, and M. A. Shehata, "A validated stability-Indicating method for the determination of sumatriptan and kinetic study of the degradation", Analytical Chemistry, An Indian Journal, vol. 12, issue 4, pp. 127-132, 2013.
Alamein, A. A. A. M., "Validated stability-indicating methods for the determination of zafirlukast in the presence of its alkaline hydrolysis degradation product - ", Bulletin of Faculty of Pharmacy, Cairo University , vol. 50,, issue 2, pp. 111-119, 2012.
Saad, A. S., N. S. Ismail, M. Soliman, and H. E.Zaazaa, "Validated Stability-Indicating RP-HPLC Method for Simultaneous Determination of Clorsulon and Ivermectin Employing Plackett-Burman Experimental Design for Robustness Testing", J, AOAC International, vol. 99, issue 2, pp. 571-578, 2016.
Saad, A. S., N. S. Ismail, M. Soliman, and H. E. Zaazaa, "Validated Stability-Indicating RP-HPLC Method for Simultaneous Determination of Clorsulon and Ivermectin Employing Plackett-Burman Experimental Design for Robustness Testing.", Journal of AOAC International, vol. 99, issue 2, pp. 571-8, 2016 Mar-Apr. Abstract

A sensitive and highly selective stability-indicating gradient HPLC method was developed and validated for simultaneous determination of clorsulon (CLO) and ivermectin (IVM) in the presence of their degradation products. The drugs were subjected to different stress conditions, including acid and alkaline hydrolysis, oxidative, thermal, and photolytic forced degradation. The robustness of the proposed method was assessed using the Plackett-Burman experimental design, the factors affecting system performance were defined, and nonsignificant intervals for the significant factors were determined. The separation was carried out on a ZORBAX SB phenyl analytical column (250 × 4.6 mm id, 5 μm particle size), with gradient elution utilizing 10 mM sodium dihydrogen phosphate and acetonitrile as mobile phase. UV detection was performed for CLO and IVM at 254 nm over a concentration range of 4-140 and 5-50 μg/mL, respectively, with mean percentage recoveries of 99.90 ± 1.30 and 98.59 ± 1.16%, respectively. The proposed method was successfully applied to a pharmaceutical dosage form containing the investigated drugs. The results were statistically compared with the official HPLC methods, and no significant differences were found.

Weshahy, S. A. E. - F., M. S. Yaaqob, M. Nebsen, D. W. Hassan, and N. F. Youssef, "Validated stability-indicating RP-LC method for the determination of pemirolast potassium investigation of kinetic behavior", RSC Advances, vol. 5, pp. 74366–74373, 2015.
S. A. E. - F. Weshahy, M. Yaaqob, M. Nebsen, D. W. Hassan, and N. F. Youssef, "Validated stability-indicating RP-LC method for the determination of pemirolast potassium investigation of kinetic behavior"", RSC Advances, vol. 5, pp. 74366–74373, 2015.
Mostafa, N. M., L. abdel-fattah, S. A. Weshahy, and undefined, "Validated Stability-Indicating Spectrophotometric Methods for the Determination of Cefixime Trihydrate in the Presence of its Acid and Alkali Degradation Products", Journal of AOAC International, vol. 98, No. 1, pp. 35-45, 2015. published_cefixime.pdf
Mostafa, N. M., L. abdel-fattah, S. A. Weshahy, N. Y. Hassan, and S. A. Boltia, "Validated Stability-Indicating Spectrophotometric Methods for the Determination of Cefixime Trihydrate in the Presence of its Acid and Alkali Degradation Products", Journal of AOAC International , vol. Vol. 98, issue No. 1, pp. 35-45, 2015. published_cefixime.pdf
Boltia, S. A., M. Abdelkawy, T. Mohammed, and N. Mostafa, "Validated stability-indicating spectrophotometric methods for the determination of Silodosin in the presence of its degradation products", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 202, pp. 131-145, 2018.
W.Ali, N., S. S. Abbas, H. E. - S. Zaazaa, M. MohamedAbdelrahmana, and M. A. Kawy, "Validated stabilityindicatingmethodsfordetermination of nitazoxanideinpresenceofitsdegradationproducts", Journal ofPharmaceuticalAnalysis, vol. 2, issue 2, pp. 104-115, 2012.
Ashour, A., M. A. M. Hegazy, A. A. Moustafa, K. O. Kelani, and laila elsayed abdel fattah, Validated stability‐indicating TLC method for the determination of noscapine, , vol. 1, issue 7: Wiley Online Library, pp. 327 - 338, 2009. Abstract
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Ashour, A., M. A. M. Hegazy, A. A. Moustafa, K. O. Kelani, and laila elsayed abdel fattah, "Validated stability‐indicating TLC method for the determination of noscapine", Drug testing and analysis, vol. 1, issue 7: Wiley Online Library, pp. 327-338, 2009. Abstract
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A.Basha, M., M. K. A. El-Rahman, L. I.Bebawy, and A. A. Moustafa, "Validated TLC stability indicating methods for the quantitative determination of some veterinary drugs", Microchemical Journal , vol. 146, pp. 157-163, 2019.
Basha, M. A., M. K. Abd El-Rahman, L. I. Bebawy, and A. A. Moustafa, Validated TLC stability indicating methods for the quantitative determination of some veterinary drugs, , vol. 146: Elsevier, pp. 157 - 163, 2019. Abstract
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Eissa, M. S., I. M. Nour, M. R. Elghobashy, and M. A. Shehata, "Validated TLC-densitometry method for simultaneous determination of brinzolamide and timolol maleate in their ophthalmic preparation", Analytical Chemistry letters, vol. 7, issue 6, pp. 805-812, 2017.