فهرس المقالات Parastoo Molaei المقاله 1 - Preconcentration and Determination of Theophylline in Water Samples using Magnetic Nano-Cellulose with Dispersive Solid Phase Extraction Parastoo Molaei ali moghimi Shahin Ahmadi seyedali sobhanian Journal of Applied Chemical Research , العدد 3 , السنة 18 , تابستان 1403