Adsorptive transfer chronopotentiometric stripping of sulphated polysaccharides

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• 作者：Sla膽ana Strme膷ki ; ^{strmecki@irb.hr} ; Marta Plav&scaron ; i膰
• 关键词：Adsorptive transfer stripping ; Catalytic hydrogen evolution ; Chondroitin sulphate ; Chronopotentiometry ; Peak H
• 刊名：Electrochemistry Communications
• 出版年：2012
• 期刊代码：29_13882481
• 类别：ch
• 出版时间：2012
• 卷：18
• 期：Complete
• 页码：100-103
• 文件大小：503 K

摘要

In this communication an ex situ analysis of sulphated polysaccharide (S-PS) chondroitin sulphate (CS) on mercury electrode is reported for the first time. The analysis was performed using adsorptive transfer chronopotentiometric stripping (AdT CPS). AdT CPS included three major steps: adsorption, transfer and stripping. S-PS served as 鈥減resodium鈥?catalyst of hydrogen evolution revealing two catalytic peaks, H'_PS and H_PS. The adsorbed CS layer was very stable after the transfer. The reproducibility of the peak H_PS was very high. Accumulation potentials more positive than 鈭?#xA0;0.6 V (vs. Ag/AgCl(3 M KCl)) were appropriate in analysis of a negatively charged twofold helix of CS in water solution.