caa a22 4500 445879718 CHVBK 20180317145538.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s00604-010-0467-1 doi (NATIONALLICENCE)springer-10.1007/s00604-010-0467-1 Voltammetric detection of guanosine and adenosine using a carbon paste electrode modified with 1-ethyl-3-methylimidazolium ethylsulfate [Elektronische Daten] [Hongwei Gao, Yuanyuan Duan, Mengying Xi, Wei Sun] A novel kind of carbon paste electrode (CPE) was prepared by mixing graphite powder, liquid paraffin and the ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate. The resulting electrode was used for the simultaneous determination of guanosine and adenosine by differential pulse voltammetry. Compared to a conventional CPE, the oxidation peak currents are largely increased, and the oxidation peak potentials are negatively shifted. The electrochemical responses to guanosine and adenosine were investigated. Under optimized conditions, the calibration curves are linear in the concentration range from 1.0 × 10-6mol L-1 to 1.6 × 10-4mol L-1 for guanosine, and from 1.0 × 10-6mol L-1 to 2.7 × 10-4mol L-1 for adenosine at pH 3.5. Substances potentially interfering in the biological matrix do no interfere. The method was successfully applied to detect adenosine and guanosine in human urine without sample treatments. Figure Cyclic voltammograms on CPE (a) and CILE (b) for 1.0 × 10-4mol L-1 adenosine and 1.0 × 10-4mol L-1guanosine in a pH 3.5 B-R buffer solution at the scan rate of 100mV s-1. Inset was the typical differential pulse voltammograms of 1.0 × 10-4mol L-1 adenosine and 1.0 × 10-4mol L-1 L guanosine on CILE Springer-Verlag, 2010 Carbon ionic liquid electrode nationallicence Guanosine nationallicence Adenosine nationallicence Differential pulse voltammetry nationallicence 1-ethyl-3-methylimidazolium ethylsulfate nationallicence Gao Hongwei Shandong Entry-Exit Inspection and Quarantine Bureau of People's Republic of China, 266002, Qingdao, China aut Duan Yuanyuan Key Laboratory of Eco-Chemical Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, China aut Xi Mengying Key Laboratory of Eco-Chemical Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, China aut Sun Wei Key Laboratory of Eco-Chemical Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, China aut Microchimica Acta Springer Vienna 172/1-2(2011-02-01), 57-64 0026-3672 172:1-2<57 2011 172 604 https://doi.org/10.1007/s00604-010-0467-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0467-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gao Hongwei Shandong Entry-Exit Inspection and Quarantine Bureau of People's Republic of China, 266002, Qingdao, China aut NATIONALLICENCE 700 1- Duan Yuanyuan Key Laboratory of Eco-Chemical Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, China aut NATIONALLICENCE 700 1- Xi Mengying Key Laboratory of Eco-Chemical Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, China aut NATIONALLICENCE 700 1- Sun Wei Key Laboratory of Eco-Chemical Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 172/1-2(2011-02-01), 57-64 0026-3672 172:1-2<57 2011 172 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer