University of North Florida
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Contact Info

Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Xiurong Yang

Abbrev:
Yang, X.R.
Other Names:
Address:
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, Jilin, China
Phone:
+86-4315262063
Fax:
+86-43152689711

Citations 5

"Electrooxidative Polymerization Of Phenothiazine Derivatives On Screen-printed Carbon Electrode And Its Application To Determine NADH In Flow Injection Analysis System"
Talanta 2004 Volume 62, Issue 3 Pages 477-482
Qiang Gao, Weidong Wang, Ying Ma and Xiurong Yang

Abstract: The electrooxidation polymerization of phenothiazine derivatives, including azure A and toluidine blue O, has been studied at screen-printed carbon electrodes in neutral phosphate buffer. Both compounds yield strongly adsorbed electroactive polymer with reversible behavior and formal potentials closed to 0.04 V at pH 6.9. The modified electrodes exhibited good stability and electrocatalysis for NADH oxidation in phosphate buffer (pH 6.9), with an overpotential of more than 500 mV lower than that of the bare electrodes. Further, the modified screen-printed carbon electrodes were found to be promising as an amperometric detector for the flow injection analysis (FIA) of NADH, typically with a dynamic range of 0.5-100 µM.

"Electropolymerization Of Azure B On A Screen-Printed Carbon Electrode And Its Application To The Determination Of NADH In A Flow Injection Analysis System"
Microchim. Acta 2004 Volume 148, Issue 3-4 Pages 335-341
Yufang Sha, Qiang Gao, Bin Qi and Xiurong Yang

Abstract: The electrooxidation polymerization of azure B on screen-printed carbon electrodes in neutral phosphate buffer was studied. The poly(azure B) modified electrodes exhibited excellent electrocatalysis and stability for dihydronicotinamide adenine dinucleotide (NADH) oxidation in phosphate buffer (pH 6.9), with an overpotential of more than 400 mV lower than that at the bare electrodes. Different techniques, including cyclic voltammetry, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy have been employed to characterize the poly (azure B) film. Furthermore, the modified screen-printed carbon electrodes were found to be promising as an amperometric detector for the flow injection analysis (FIA) of NADH, typically with a dynamic range of 0.5 µM to 100 µM.

"Measurements Of Dissolved Oxygen In Batch Solution And With Flow Injection Analysis Using An Enzyme Electrode"
Biosensors 1989 Volume 4, Issue 4 Pages 241-249
Xiurong Yang

Abstract: The electrode previously described (Anal. Abstr., 1989, 51, 6J177) is mounted in a flow-through wall-jet cell and applied in a single-line flow injection system. The carrier solution (0.8 mL min-1) is 10 mM glucose in 0.1 M phosphate buffer of pH 7.0 and is deoxygenated online with use of a reactor containing glucose oxidase and catalase. The electrode is operated at +0.45 V vs. a SCE. For a 14 µL sample solution, the calibration graph is rectilinear up to ~9 ppm of O. With the proposed system a throughput of 360 samples per hour is achieved with a precision of 0.4% (n = 17).
Oxygen Electrode Electrode Sensor Buffer Immobilized enzyme Reactor

"Preparation Of Poly(thionine) Modified Screen-printed Carbon Electrode And Its Application To Determine NADH In Flow Injection Analysis System"
Biosens. Bioelectron. 2003 Volume 19, Issue 3 Pages 277-282
Qiang Gao, Xiaoqiang Cui, Fan Yang, Ying Ma and Xiurong Yang

Abstract: A poly(thionine) modified screen-printed carbon electrode has been prepared by an electrooxidative polymerization of thionine in neutral phosphate buffer. The modified electrodes are found to give stable and reproducible electrocatlytic responses to NADH and exhibit good stability. Several techniques, including cyclic voltammetry, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), have been employed to characterize the poly(thionine) film. Further, the modified screen-printed carbon electrode was found to be promising as an amperometric detector for the flow injection analysis (FIA) of NADH, typically with a dynamic range of 5-100 µM.

"Flow Injection Electrochemical Enzyme Immunoassay Based On The Use Of An Immunoelectrode Strip Integrate Immunosorbent Layer And A Screen-printed Carbon Electrode"
Anal. Chim. Acta 2003 Volume 488, Issue 1 Pages 61-70
Qiang Gao, Ying Ma, Zhiliang Cheng, Weidong Wang and Xiurong Yang

Abstract: A flow injection amperometric immunoassay system based on the use of screen-printed carbon electrode for the detection of mouse IgG was developed. An immunoelectrode strip, on which an immunosorbent layer and screen-printed carbon electrode were integrated, and a proposed flow cell have been fabricated. The characterization of the flow immunoassay system and parameters affecting the performance of the immunoassay system were studied and optimized. Amperometric detection at 0.0 V (versus Ag/AgCl) resulted in a linear detection range of 30-700 ng mL-1, with a detection limit of 3 ng mL-1. The signal variation among electrode strips prepared from variant batch did not exceed 8.5% (n=7) by measuring 0.5 µg mL-1 antigen standard solution.