caa a22 4500 44588147X CHVBK 20180317145544.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s00604-011-0602-7 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0602-7 Electrochemical determination of paraquat using a DNA-modified carbon ionic liquid electrode [Elektronische Daten] [Nannan Mai, Xiaoying Liu, Wanzhi Wei, Shenglian Luo, Wei Liu] Deoxyribonucleic acid (DNA) was electrochemically deposited on a carbon ionic liquid electrode to give a biosensor with excellent redox activity towards paraquat as shown by cyclic voltammetry and differential pulse voltammetry. Experimental conditions were optimized with respect to sensing paraquat by varying the electrochemical parameters, solution pH, and accumulation time of DNA. Under the optimized conditions, a linear relation exists between the reduction peak current and the concentration of paraquat in the range from 5 × 10−8 mol L−1 to 7 × 10−5 mol L−1, with a detection limit of 3.6 × 10−9 mol L−1. The utility of the method is illustrated by successful analysis of paraquat in spiked real water samples. Figure The DNA was electrodeposited onto the CILE under +1.5V for 1200s. The electrochemical behaviors of paraquat on the modified electrode had been studied by cyclic voltammetry and differential pulse voltammetry. Five ml phosphate buffer (pH 7.0) solution was added into an electrochemical cell (10ml) and then paraquat was successfully added into the cell. The differential pulse voltammograms were recorded when swept from −0.8V to −0.3V. The peak currents at about −0.63V for paraquat were measured. Springer-Verlag, 2011 Carbon ionic liquid electrode nationallicence DNA nationallicence Differential pulse voltammetry nationallicence Electrochemistry deposition nationallicence Paraquat nationallicence Mai Nannan State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut Liu Xiaoying State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut Wei Wanzhi State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut Luo Shenglian State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut Liu Wei State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut Microchimica Acta Springer Vienna 174/1-2(2011-07-01), 89-95 0026-3672 174:1-2<89 2011 174 604 https://doi.org/10.1007/s00604-011-0602-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0602-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mai Nannan State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut NATIONALLICENCE 700 1- Liu Xiaoying State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut NATIONALLICENCE 700 1- Wei Wanzhi State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut NATIONALLICENCE 700 1- Luo Shenglian State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut NATIONALLICENCE 700 1- Liu Wei State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, 410082, Changsha, People's Republic of China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 174/1-2(2011-07-01), 89-95 0026-3672 174:1-2<89 2011 174 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer