caa a22 4500 378891790 CHVBK 20180305123456.0 cr unu---uuuuu 161128e20041101xx s 000 0 eng 10.1524/zpch.218.11.1273.50808 doi (NATIONALLICENCE)gruyter-10.1524/zpch.218.11.1273.50808 Voltammetric Behaviour of Pentoxifylline at Mercury Electrode [Elektronische Daten] [Ender Biçer, Elif Çınar] The voltammetric behaviour of pentoxifylline (1-(5′-oxohexyl)-3,7-dimethylxanthine, PTX) was studied in several supporting electrolytes (Britton-Robinson buffer of pH 2-12, 0.1M NH3/NH4Cl buffer (pH 9.08), 0.1M Na2B4O7 (pH 9.30), 0.1M KCl (pH 6.22). At 0.1M Britton-Robinson buffer (pH 7.46) PTX gives two peaks at −0.150V and −1.524V, respectively. At low pH values (pH < 5.50), the second peak was obscured by the hydrogen evolution while the first peak is well defined at 0.1M KNO3 supporting electrolyte (pH 6.22). The potential of the second peak is practically pH-independent in the pH range of 6.50-11.00. The peaks (at −0.150V and −1.524V) are attributed to the reduction of Hg(I)-PTX complex and carbonyl group at 5′-oxohexyl moiety of the molecule, respectively. The relationship between peak current of carbonyl group and concentration of PTX is linear in 1.48 × 10−5 − 1.34 × 10−4M concentration range in 0.1M KCl (pH 6.22). It was observed that PTX has adsorption/desorption characteristics. A plausible mechanism is proposed for the electrode reaction of PTX on the mercury electrode. © 2004 Oldenbourg Wissenschaftsverlag GmbH Thermodynamics & statistical physics nationallicence Laboratory techniques, experiments nationallicence Physical chemistry nationallicence Biçer Ender aut Çınar Elif aut Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/11/2004(2004-11-01), 1273-1287 0942-9352 218:11/2004<1273 2004 218 zpch https://doi.org/10.1524/zpch.218.11.1273.50808 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/zpch.218.11.1273.50808 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Biçer Ender aut NATIONALLICENCE 700 1- Çınar Elif aut NATIONALLICENCE 773 0- Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/11/2004(2004-11-01), 1273-1287 0942-9352 218:11/2004<1273 2004 218 zpch CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter