caa a22 4500 445881348 CHVBK 20180317145544.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00604-011-0619-y doi (NATIONALLICENCE)springer-10.1007/s00604-011-0619-y Carbon paste electrode modified with a binuclear manganese complex as a sensitive voltammetric sensor for tryptophan [Elektronische Daten] [Jinsheng Xu, Yali Yuan, Wei Li, Peihong Deng, Jian Deng] We report on a carbon paste electrode that was modified with a binuclear manganese(II) complex by the drop-coating method. A study on the mechanism of the electro-oxidation of tryptophan (Trp) at this electrode indicated that it enables Trp to be determined with good sensitivity and selectivity. Second-order derivative linear sweep voltammetry at pH 4.1 revealed that a sensitive anodic peak appears at 812mV (vs. SCE) whose current is proportional to the concentration of Trp in the concentration range from 0.1 to 1.0μmolL−1 and 1.0 to 80μmolL−1, with a detection limit (S/N = 3) of 0.08μmolL−1 (60s of accumulation). The method was applied to the determination of Trp in amino acid injection solutions with satisfactory results. Figure The electrochemical behavior of tryptophan at a carbon paste electrode modified with a binuclear manganese(II) complex Mn2(phen)2(p-MBA)4(H2O) was investigated. The modified electrode showed high electrocatalytic activity toward the oxidation of tryptophan and the peak current increases linearly with tryptophan concentration in the range of 0.1 to 80μmol L−1. Springer-Verlag, 2011 Binuclear manganese(II) complex nationallicence Carbon paste electrode nationallicence Tryptophan nationallicence Xu Jinsheng Department of Chemistry and Material Science, Hengyang Normal University, 421008, Hengyang, China aut Yuan Yali College of Chemistry and Chemical Engineering, Nanhua University, 421001, Hengyang, China aut Li Wei Department of Chemistry and Material Science, Hengyang Normal University, 421008, Hengyang, China aut Deng Peihong Department of Chemistry and Material Science, Hengyang Normal University, 421008, Hengyang, China aut Deng Jian College of Chemistry and Chemical Engineering, Nanhua University, 421001, Hengyang, China aut Microchimica Acta Springer Vienna 174/3-4(2011-09-01), 239-245 0026-3672 174:3-4<239 2011 174 604 https://doi.org/10.1007/s00604-011-0619-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0619-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu Jinsheng Department of Chemistry and Material Science, Hengyang Normal University, 421008, Hengyang, China aut NATIONALLICENCE 700 1- Yuan Yali College of Chemistry and Chemical Engineering, Nanhua University, 421001, Hengyang, China aut NATIONALLICENCE 700 1- Li Wei Department of Chemistry and Material Science, Hengyang Normal University, 421008, Hengyang, China aut NATIONALLICENCE 700 1- Deng Peihong Department of Chemistry and Material Science, Hengyang Normal University, 421008, Hengyang, China aut NATIONALLICENCE 700 1- Deng Jian College of Chemistry and Chemical Engineering, Nanhua University, 421001, Hengyang, China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 174/3-4(2011-09-01), 239-245 0026-3672 174:3-4<239 2011 174 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer