Voltammetry of Os(VI)-Modified Polysaccharides
Polysaccharides (PSs), such as dextran, yeast mannan, starch and amylose, were modified with complexes of six-valent osmium with nitrogen ligands [Os(VI)L] and voltammetric behavior of PS-Os(VI)L adducts was studied at mercury and carbon electrodes. Using Os(VI)temed as a modification agent and adsorptive transfer stripping (ex situ) method it was possible to determine PSs at submicromolar concentrations directly in the reaction mixture in an excess of monomeric glucose or sucrose both at Hg and carbon electrodes. Conventional (in situ) PS determination in the reaction mixture was possible only with mercury electrodes. The above methods have great potentiality in biological research.