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Abstract
This thesis is dealing with the development of new methods for determination of some central nervous system stimulants in both drug substance and pharmaceutical formulations and also in presence of their degradation products. The proposed methods were applied for each drug and good recoveries were obtained. Also the thesis was included discussion of the procedures and the results that coherent to each individual part. Statistical comparisons between the results of the proposed methods and those obtained by official or the reported methods for the drug in concern and we find that there are no significant difference