University of North Florida
Browse the Citations
-OR-

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

View Stuart Chalk's profile on LinkedIn

Guo Yi Zhu

Abbrev:
Zhu, G.Y.
Other Names:
Guo-yi Zhu, Guoyi Zhu
Address:
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
Phone:
+86-431-526-2069
Fax:
+86-431-568-5653

Citations 6

"Rapid Automated In-situ Monitoring Of Total Dissolved Iron And Total Dissolved Manganese In Underground Water By Reverse-flow Injection With Chemiluminescence Detection During The Process Of Water Treatment"
Talanta 1997 Volume 44, Issue 11 Pages 2041-2049
Yanxiu Zhou and Guoyi Zhu*

Abstract: Measurement of iron and manganese is very important in evaluating the quality of natural waters. We have constructed an automated Fe(II), total dissolved iron(TDI), Mn(II), and total dissolved manganese(TDM) analysis system for the quality control of underground drinking water by reverse flow injection analysis and chemiluminescence detection(rFIA-CL). The method is based on the measurement of the metal-catalyzed light emission from luminol oxidation by potassium periodate. The typical signal is a narrow peak, in which the height is proportional to light emitted and hence to the concentration of metal ions. The detection limits were 3 x 10^-6 µg mL-1 for Fe(II) and the linear range extents up to 1.0 x 10^-4 and 5 x 10^-6 µg mL-1 for Mn(II) cover a linear range to 1.0 x 10^-4 µg mL-1. This method was used for automated in-situ monitoring of total dissolved iron and total dissolved manganese in underground water during water treatment.
Iron Manganese Environmental Chemiluminescence Reverse

"A Novel Renewable Plant Tissue-based Electrochemiluminescent Biosensor For Glycolic Acid"
Sens. Actuat. B 2004 Volume 98, Issue 2-3 Pages 115-121
Liande Zhu, Yingxiu Li and Guoyi Zhu

Abstract: A novel plant tissue biosensor based on the electrochemiluminescence of luminol has been developed for glycolic acid flow injection analysis. The spinach leaves were bulk-immobilized conveniently by directly mixing with carbon paste. The surface of the biosensor can be renewed in case of contamination. After optimization of the working parameters, glycolic acid could be quantitated in the range of 25 µM to 1 mM with a detection limit of 15 µM. The relative standard deviation was 4.2% for 11 replicated measurements of 0.1 mM glycolic acid. The ECL biosensor also showed good selectivity, repeatability and reasonable operational stability.

"A Novel Flow Through Optical Fiber Biosensor For Glucose Based On Luminol Electrochemiluminescence"
Sens. Actuat. B 2002 Volume 86, Issue 2-3 Pages 209-214
Liande Zhu, Yingxiu Li and Guoyi Zhu

Abstract: A novel flow injection optical fiber biosensor for glucose based on luminol electrochemiluminescence (ECL) is presented. The sol-gel method is introduced to immobilize glucose oxidase (GOD) on the surface of a glassy carbon electrode. After optimization of the working conditions, glucose could be quantitated in the concentration ranges between 50 µM and 10 mM with a detection limit of around 26 µM. Signal reproducibility was about 3.62% relative standard deviation for 11 replicated measurements of 0.1 mM glucose. The ECL biosensor also showed good selectivity and operational stability. The proposed method can be applied to determination of glucose in soft drink samples.
Glucose

"Flow Injection Analysis Of Histidine With Enhanced Electrogenerated Chemiluminescence Of Luminol"
Chin. Chem. Lett. 2002 Volume 13, Issue 11 Pages 1093-1096
Lian De ZHU, Ying Xiu LI, Guo Yi ZHU

Abstract: A simple and sensitive flow injection method is presented for the determination of histidine based on its enhancement of electrogenerated chemiluminescence (ECL) of luminol. After optimization of the experimental parameters, the working range for histidine was in 1.0 x 10^-6 to 1.0 x 10^-3 mol/L with a detection limit (S/N = 3) of 0.56 ?mol/L. The relative standard deviation was 1.6% for 11 measurements of 5 x 10^-5 mol/L histidine solution. The proposed method has been successfully applied to the determination of histidine in real pharmaceutical preparation.

"Electrochemiluminescent Determination Of L-Cysteine With A Flow-Injection Analysis System"
Anal. Sci. 2003 Volume 19, Issue 4 Pages 575-578
Liande Zhu, Yingxiu Li And Guoyi Zhu

Abstract: A flow-injection electrochemiluminescent method for L-cysteine determination has been developed based on its enhancement of the electrochemiluminecence of luminol at a glassy carbon electrode. This method is simple and sensitive for cysteine determination. Under the selected experimental parameters, the linear range for cysteine concentration was 1.0 x 10^-6 - 5.0 x 10^-5 mol/l, and the detection limit was 0.67 µmol/l (S/N = 3). The relative standard deviation for 11 measurements of 1.0 x 10^-5 mol/l cysteine was 4.5%. The proposed method has been applied to the detection of cysteine in pharmaceutical injections with satisfactory results.

"Flow Injection Determination Of Dopamine Based On Inhibited Electrochemiluminescence Of Luminol"
Anal. Lett. 2002 Volume 35, Issue 15 Pages 2527-2537
Liande Zhu, Yingxiu Li, Guoyi Zhu

Abstract: A flow injection method has been developed for the determination of dopamine based on its inhibition of the electrochemiluminescence of luminol. This method is simple and sensitive for dopamine detection. Under the selected experimental conditions, the decreased electrochemiluminescent intensity is linear with dopamine concentration in the range of 5.0 x 10^-8-1.0 x 10^-5 mol/L with a detection limit of 30 nmol/L. The relative standard deviation of eleven determinations is 1.9% for 1.0 x 10^-6 mol/L dopamine. The proposed method has been applied to the detection of dopamine in pharmaceutical injections with satisfactory results.