List of Articles Co (II) Open Access Article Abstract Page Full-Text 1 - Preconcentration of trace Co (II) in water samples using modified Multiwall nano tube carbon ali moghimi Nilofar Tajodini Milad Abniki Open Access Article Abstract Page Full-Text 2 - Preparation of Modified Magnetic Nanocomposites Dithiooxamide/Fe3O4 for Preconcentration and Determination of Trace Amounts of Cobalt Ions in Food and Natural Water Samples Ali Mirabi Nafiseh Aliakbari 10.22034/jchr.2016.544156