List of Articles Preconcentration Open Access Article Abstract Page Full-Text 1 - Fast Monitoring of the Phosphate Ions at Sub-mg L level with the Aim of Diamine-grafted MCM-41 Mesoporous silica and Ion Chromatography Leila Hajiaghababaei Sima Djam 20.1001.1.20083815.2015.9.4.2.5 Open Access Article Abstract Page Full-Text 2 - Solid-phase Extraction Using Modified Carbon Nanotube and Cupferron Ligand for Preconcentration and Determination of Trace Amounts of Copper in Real Samples Maasoomeh Ghasemi Ali Moghimi Mohammad-Ali Karimi Shahla Mozaffari 20.1001.1.20083815.2018.12.3.2.4 Open Access Article Abstract Page Full-Text 3 - Synthesize of Ion Imprinted Polymer for Selective Extraction of lead (II) from Environmental Water Samples Mahboobeh Manoochehri Homayon Ahmad Panahi Meghdad Karimi 20.1001.1.20083815.2013.7.1.4.7 Open Access Article Abstract Page Full-Text 4 - 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 Open Access Article Abstract Page Full-Text 5 - Preconcentration and Determination of Biperiden by using Solvent Bar Micro Extraction Combined with HPLC in Biological Fluids and Optimization by Chemometrics Design Melika Mohamadi persia behbahani Seyedali Sobhanian