List of Articles Natural water samples Open Access Article Abstract Page Full-Text 1 - Screening Method for Mononitrotoluenes in Natural Waters Using Magnetic Solvent Bar Liquid-Phase Micro-extraction Followed by Gas Chromatography-Flame Ionization Detection Hadi Farahani Behrooz Mirza Open Access Article Abstract Page Full-Text 2 - Using amberlite XAD-4 to absorbtion of heay metals Co and Cu from Caspian Sea's water samples M. Kashefi Asl N. Soofi