Reversed-Phase High-Performance Liquid Chromatography and High-Performance Thin-layer Liquid Chromatography Methods for Simultaneous Determination of Theophylline, Guaifenesin and Guaifenesin Impurity (Guaiacol) in Their Bulk Powders and in Dosage Form

2018 ◽  
Vol 56 (9) ◽  
pp. 846-852 ◽  
Author(s):  
Eglal A Abdelaleem ◽  
Ibrahim A Naguib ◽  
Shimaa A Farag ◽  
Hala E Zaazaa
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