Adsorptive transfer chronopotentiometric stripping of sulphated polysaccharides
| العنوان: | Adsorptive transfer chronopotentiometric stripping of sulphated polysaccharides |
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| المؤلفون: | Marta Plavšić, Slađana Strmečki |
| المساهمون: | International Society of Electrochemistry |
| المصدر: | Electrochemistry Communications, Vol 18, Iss, Pp 100-103 (2012) Electrochemistry Communications |
| بيانات النشر: | Elsevier BV, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Stripping (chemistry), Inorganic chemistry, 02 engineering and technology, 01 natural sciences, Catalysis, lcsh:Chemistry, Adsorption, Chondroitin sulphate, adsorptive transfer stripping, catalytic hydrogen evolution, chondroitin sulphate, chronopotentiometry, peak H, Electrochemistry, Marine Science, Hydrogen evolution, Chemistry, 010401 analytical chemistry, Dropping mercury electrode, 021001 nanoscience & nanotechnology, 6. Clean water, 0104 chemical sciences, Interdisciplinary Natural Sciences, lcsh:Industrial electrochemistry, lcsh:QD1-999, Helix, Sulphated polysaccharides, 0210 nano-technology, Adsorptive transfer chronopotentiometric stripping, Peak H, Seawater, Buffer, lcsh:TP250-261 |
| الوصف: | Sulphated polysaccharides (S-PSs) act as a “presodium” catalyst of hydrogen evolution on mercury electrode in a buffered sodium chloride solution. Two catalytic peaks named peak H'PS and peak HPS appear as a result of hydrogen evolution. This work presents the catalytic effect of S-PS placed in seawater (pH 8.2) where direct stripping did not give catalytic peaks. An adsorptive transfer procedure (AdT) was applied in order to enable the analysis of S-PS in seawater. Accumulated S-PS was transferred from seawater to buffered sodium chloride solution (pH 5.1) which was the stripping electrolyte. Chronopotentiometric stripping method (CPS) was applied with stripping done by constant reduction current. Model S-PSs chondroitin sulphate, ι-, κ- and λ - carrageenans, and nonsulphated PS dextran, having different structures and thus making different conformation in water solution, were reagents in AdT experiments. A static mercury drop electrode (drop size 0.40 mm2) was a working electrode. Results have shown that the adsorbed layer of S-PS was very stable after the transfer step. The impact of measurement conditions (accumulation potential and time, stripping current and S-PS concentrations) on peak HPS height and potential was examined. Detection limit was found to be in the range of pmol dm-3. AdT procedure coupled with CPS method appears to be useful for S-PS analysis in natural seawater where S-PSs are identified as main constituents of organic matter. |
| وصف الملف: | application/pdf |
| تدمد: | 1388-2481 |
| DOI: | 10.1016/j.elecom.2012.02.029 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cc15bcb663425ffe2ff4101fa0f6b8d https://doi.org/10.1016/j.elecom.2012.02.029 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....5cc15bcb663425ffe2ff4101fa0f6b8d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13882481 |
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| DOI: | 10.1016/j.elecom.2012.02.029 |