Development of microextraction methods for the determination of sulfamethoxazole in water and biological samples: modelling, optimization and verification by central composite desi... oleh Issa Sheibani Amin, Ali Naser Neysari, Raed H. Althomali, Ebraheem Abdu Musad Saleh, Sayfiddin Baymakov, Sayfiddin Baymakov, Ahmed Hussien Radie Alawady, Ahmed Hussien Radie Alawady, Ahmed Hussien Radie Alawady, Ali Hashiem Alsaalamy, Montather F. Ramadan, Ashima Juyal