Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i. Kralovopolska 135, 612 65 Brno, Czech Republic.
Analyst. 2011 Jan 21;136(2):321-6. doi: 10.1039/c0an00681e. Epub 2010 Nov 11.
Electroinactive polysaccharides (PS) modified by osmium(VI) complexes with nitrogenous ligands produce redox couples at carbon and mercury electrodes. We show that PS adducts with Os(VI) 2,2'-bipyridine produce at ~-1.2 V (against Ag/AgCl/3 M KCl electrode) an additional peak at mercury and solid amalgam electrodes. This peak is due to the catalytic hydrogen evolution, allowing detection of PS (such as dextran and mannan) at picomolar concentrations.
电化学惰性多糖（PS）经含氮配体的锇（VI）配合物修饰后，在碳和汞电极上产生氧化还原对。我们发现 PS 与 Os（VI）2,2'-联吡啶的加合物在~-1.2 V（相对于 Ag/AgCl/3 M KCl 电极）下，在汞和固体汞齐电极上产生了一个额外的峰。该峰归因于催化氢的析出，从而可以在皮摩尔浓度下检测到 PS（如葡聚糖和甘露聚糖）。
