caa a22 4500 445881461 CHVBK 20180317145544.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s00604-011-0594-3 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0594-3 Electrochemical determination of NADH using a glassy carbon electrode modified with Fe3O4 nanoparticles and poly-2,6-pyridinedicarboxylic acid, and its application to the determination of antioxidant capacity [Elektronische Daten] [Lin Cui, Shiyun Ai, Kun Shang, Xiaomeng Meng, Chengcheng Wang] We have prepared a glassy carbon electrode modified with poly-2,6-pyridinedicarboxylic acid and with magnetic Fe3O4 nanoparticles. This modification enhances the effective surface area and the electrocatalytic oxidation of nicotinamide adenine dinucleotide (NADH) in addition to providing positively charged groups for electrostatic assembly of the phosphate group of NADH. The modified electrode responds linearly to NADH in the range from 5 × 10−8 to 2.5 × 10−5M and gives a lower detection limit of 1 × 10−8M. It displays satisfactory selectivity and reproducibility. The sensor was applied to rapid screening of plant extracts for their antioxidant properties. Figure Poly-2,6-pyridinedicarboxylic acid (PDC) was fabricated by electropolymerizing 2,6-pyridinedicarboxylic acid with cyclic voltammetry (CV) on the glassy carbon electrode (GCE) surface. The magnetic Fe3O4 nanoparticles treated with aminopropyltriethoxysilane (APTS) modified on the PDC/GCE to form APTS-Fe3O4/PDC composite film. The APTS-Fe3O4/PDC film had enhanced the effective electrode surface area and provided positively charged groups for electrostatic assembly of phosphate group of NADH. Springer-Verlag, 2011 APTS-Fe3O4 nanoparticles nationallicence Poly-2,6-pyridinedicarboxylic acid nationallicence NADH nationallicence Determination nationallicence Electrochemistry nationallicence Cui Lin College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut Ai Shiyun College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut Shang Kun College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut Meng Xiaomeng College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut Wang Chengcheng College of Chemistry and Chemical Engineering, Nanjing University, 210093, Nanjing, Jiangsu, People's Republic of China aut Microchimica Acta Springer Vienna 174/1-2(2011-07-01), 31-39 0026-3672 174:1-2<31 2011 174 604 https://doi.org/10.1007/s00604-011-0594-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0594-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cui Lin College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut NATIONALLICENCE 700 1- Ai Shiyun College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut NATIONALLICENCE 700 1- Shang Kun College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut NATIONALLICENCE 700 1- Meng Xiaomeng College of Chemistry and Material Science, Shandong Agricultural University, 271018, Taian, Shandong, People's Republic of China aut NATIONALLICENCE 700 1- Wang Chengcheng College of Chemistry and Chemical Engineering, Nanjing University, 210093, Nanjing, Jiangsu, People's Republic of China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 174/1-2(2011-07-01), 31-39 0026-3672 174:1-2<31 2011 174 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer