Silica Fabrics Based Test Systems, Modified with Polyamine and Sulfo Derivatives of Organic Reagents, for Iron(II) Determination

Technique of the synthesis of silica fabrics based test systems modified with polymeric amine and 4,7-diphenyl-1,10-phenanthrolindisulfonic acid, 4,5-dihydroxy-1,3-benzenedisulfonic acid and 1,8-dihydroxynaphthalene-3,6-disulfonic acid was proposed. Test method using test system with functional groups of 4,7-diphenyl-1,10-phenanthrolindisulfonic acid was developed in the form of color scale for iron(II) content determination. The limit of visual detection was 0.005 mu g ml-1, an analytical concentration range was between 0.01 and 5 mu g ml-1.