List of Articles Extraction Open Access Article Abstract Page Full-Text 1 - Review of preconcentration and solid phase extraction for the determination of trace Lead Open Access Article Abstract Page Full-Text 2 - Dispersive solid-phase extraction method with 2-aminopyridine/graphene oxide nano-plates of trace Co(II) in water samples Open Access Article Abstract Page Full-Text 3 - Extraction sorbent with nanographene with aminopropyltriethoxysilane for the preconcentration (APTES) on surfactant coated C18 of Cd(II) in water Open Access Article Abstract Page Full-Text 4 - Preparation of Sodium Dodecyl Sulfate Modified Pyrrolidine-1-dithiocarboxylic acid Ammonium Coated Magnetite Nanoparticles for Magnetic Solid Phase Extraction of Pb(II) from Water Samples Open Access Article Abstract Page Full-Text 5 - Preconcentration and Determination of Chromium (III) from Sea Water Samples Using Ion Imprinted Activated Carbon Open Access Article Abstract Page Full-Text 6 - Fabrication method of extracting Cadmium(II) and Lead(II) in water samples using Nano Graphene modified 2-propyl-piperidine-1-carbodithioate Open Access Article Abstract Page Full-Text 7 - Dispersive Solid Phase Extraction of trace Pb(II) in water samples by New Fabricated Multi walled carbon nanotubes carboxylate Open Access Article Abstract Page Full-Text 8 - Extraction of Co(II) by Isocyanate Treated Graphite Oxides (iGOs) Adsorbed on Surfactant Coated C18 Before Determination by FAAS Open Access Article Abstract Page Full-Text 9 - Preconcentration of Pb(II) by Graphene Oxide with Covalently Linked Porphyrin Adsorbed on Surfactant Coated C18 before Determination by FAAS