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	1. Ferrocenoyl Glutathione Modified Electrodes: Fabrication and Application for Detection of Cadmium Ions
	Fan Meiyi,Wang Fangbin,Liu Younian,Wang Jianxiu,Zeng Dongming,Huang Ke-ong
	Chemistry 25 December 2006
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	Abstract:In this paper, 1’-cysteaminecarbonyl-1-glutathionecarbonyl-ferrocene (Fc-GSH) (4) was firstly synthesized from ferrocene dicarboxylic acid and reduced glutathione (GSH) with several steps. The products were characterized by IR and 1H-NMR. Then Fc-GSH was immobilized on the surface of gold electrode. Cyclic votammetry (CV) was adapted to investigate the electrochemical properties of this Fc-GSH modified electrode in the cadmium ions aqueous solutions. In the presence of cadmium ions,large anodic shift was observed in the experiment. Moreover this shift was proportion to the concentration of Cd2+ when the concentration of cadmium ions is lower than 20 nM. So the modified electrode was used as probes to detect cadmium ions with the limitation of 0.1 nM by cyclic voltammetry.
	TO cite this article:Fan Meiyi,Wang Fangbin,Liu Younian, et al. Ferrocenoyl Glutathione Modified Electrodes: Fabrication and Application for Detection of Cadmium Ions[OL].[25 December 2006] http://en.paper.edu.cn/en_releasepaper/content/10462


	2. Hollow fibre based Liquid-liquid-liquid microextraction combined with HPLC for the speciation of organomercury
	Xia Linbo ,Hu Bin ,Wu Yunli
	Chemistry 27 November 2006
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	Abstract:A novel and extremely highly sensitive method for the speciation of organomercury in seafood and environmental water samples was developed by liquid-liquid-liquid microextraction combined with high-performance liquid chromatography (HPLC). The simultaneous preconcentration of methylmercury (MeHg), ethylmercury (EtHg), and phenylmercury (PhHg) and their subsequent off-line HPLC separation has been described in this work. The factors affecting on the liquid-liquid-liquid microexraction of organomercury species, including organic solvent, the pH of donor phase, concentration of chelating reagent, extraction time and stirring rate were investgated and the optimal extraction conditions were established. With the consumption of 3.8 mL of sample solution, the enrichment factors were about 120, 215, and 350 for MeHg, EtHg, and PhHg, respectively. The detection limits were 3.8–0.3 ng mL−1 (as Hg). Precisions (R.S.D. (%), n=7) ranged from 6.4 to 8.9% at the 30-ng mL−1 (as Hg) level. The developed technique was validated by analyzing a certified reference material (DORM-2, dogfish-muscle, NRCC) and an environmental water sample, and the analytical results were satisfactory.
	TO cite this article:Xia Linbo ,Hu Bin ,Wu Yunli . Hollow fibre based Liquid-liquid-liquid microextraction combined with HPLC for the speciation of organomercury[OL].[27 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9911

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	3. Spectrophotometric Determination of Albumin in Serum Using a Novel Near-Infrared Cyanine Dye, 5,5’-Dicarboxy-1,1’-Disulfobutyl-3,3,3’,3’- Tetramethylindotricarbocyanine
	Li Weirong,Guo Xiaofeng,Zhang Huashan,Wang Hong
	Chemistry 21 November 2006
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	Abstract:Near-infrared (NIR) dyes (λem > 650 nm) are very promising for the analysis of biological samples, because their long wavelengths allow for minimization of interferences from biomolecule matrices. In this paper, a novel NIR dye, 5,5’-dicarboxy-1,1’-disulfobutyl-3,3,3’,3’-tetramethylindotricarbocyanine (DCDSTCY) has been developed for the spectrophotometric assay of total proteins in serum. Under acidic conditions, the binding of DCDSTCY to proteins caused a new peak at 878 nm, the height of which was proportionable to the concentration of proteins. The linear range was found to be 0.04-0.5 μg mL-1 for bovine serum albumin (BSA) and human serum albumin (HAS) with the detection limits of 5 ng mL-1, respectively. The maximum binding number of BSA with DCDSTCY was measured as 133. The proposed method has been applied to the quantitation of total proteins in serum with recoveries of 96.6-104%.
	TO cite this article:Li Weirong,Guo Xiaofeng,Zhang Huashan, et al. Spectrophotometric Determination of Albumin in Serum Using a Novel Near-Infrared Cyanine Dye, 5,5’-Dicarboxy-1,1’-Disulfobutyl-3,3,3’,3’- Tetramethylindotricarbocyanine[OL].[21 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9742


	4. Electrochemistry and AFM characterization of thin film of SnSex compound formed on a slice-like gold plane electrode
	Shang Wei ,Zhang Xin ,Chang Yanlong ,Wang Chunming
	Chemistry 06 November 2006
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	Abstract:The formation of the Ⅳ-ⅥA compound SnSex on a slice-like gold plane electrode at room temperature by electrochemical atomic layer epitaxy (EC-ALE) is reported here. In electrodeposition, surface limited reactions are used to form atomic layers of the elements making up a compound (Sn and Se) in a cycle. Cyclic voltammograms were used to determine approximate deposition potentials for each element. The amperometric I-t method was used to deposit the compound of SnSex. The film’s structure was characterized by Atomic Force Microscopy (AFM). The results were consistent with the layer-by-layer growth mode and the principles of atomic layer epitaxy. It was found that the thin films contain the properties of the photon crystals.
	TO cite this article:Shang Wei ,Zhang Xin ,Chang Yanlong , et al. Electrochemistry and AFM characterization of thin film of SnSex compound formed on a slice-like gold plane electrode[OL].[ 6 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9306


	5. Aluminum (Ⅲ) ion sensor based on the sensitive membrane containing nano-sized Al2O3 powders
	Ma Chuanli ,He Lijun ,Wang Chunming
	Chemistry 06 November 2006
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	Abstract:An Al3+ sensor based on the membrane of acetyl cellulose containing nano -Al2O3 crystals was studied. In the buffer solution of 0.5 mol/L CH3COOH - CH3COONa（pH=5.0), the sensor responds to Al3+ in a linear range from 1.00 ×10-5 to 1.00×10-2 mol/L. A near-Nernstian response was obtained and the regression equation was E (mv) = -161.4 -26.54 lg[Al3+] with a detection limit of 7.90×10-6 mol/L. More than 14 different ions as the considered interferences were tested and the relevant selectivity coefficients were determined using the separate solution method (SSM). The sensor possesses many advantages including short conditioning time, fast response, and, especially, very good selectivity over a wide variety of other co-existing ions. The sample analysis on the aluminium migration amount from aluminium utensils to the solution was determined by this sensor. The analytical results were agreed with that of inductively coupled plasma-atomic emission spectroscopy (ICP-AES).
	TO cite this article:Ma Chuanli ,He Lijun ,Wang Chunming. Aluminum (Ⅲ) ion sensor based on the sensitive membrane containing nano-sized Al2O3 powders[OL].[ 6 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9285


	6. Electrochemical Detection of Nitric Oxide on a SWCNT/RTIL Composite Gel Microelectrode
	Chang Ming Li,Jianfeng Zang,Dong Ping Zhan,Wei Chen,Sun Changqing,Ai. L. Teo,Yek. T. Chua, Vee. S. Lee, Shabbir. M. Moochhala
	Chemistry 27 April 2006
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	Abstract:Single walled carbon nanotubes (SWCNT) and room temperature ionic liquid (RTIL) were used to make a gel microelectrode for studies of the oxidation of nitric oxide (NO). The Faraday response of the gel microelectrode was contributed from two components: an outside-surface microdisk and a thin-layer cell formed by inner porous electrode materials, and enhanced by the thin-layer effect. An EC mechanism, electrochemical NO oxidation followed by a chemical oxidation, was proposed. The gel microelectrode with a Nafion® coating eliminated interferences from nitrite and some biomolecules, improved stability, and had a linear response range from 100 nM to 100 µM.
	TO cite this article:Chang Ming Li,Jianfeng Zang,Dong Ping Zhan, et al. Electrochemical Detection of Nitric Oxide on a SWCNT/RTIL Composite Gel Microelectrode[OL].[27 April 2006] http://en.paper.edu.cn/en_releasepaper/content/6429


	7. CuO Nanoparticles as an Amperometric Sensor for Cysteine
	Hui Yao,Jin-Zhong Xu,Jun-Jie Zhu
	Chemistry 20 December 2005
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	Abstract:CuO nanoparticles with an average size of 5nm have been successfully prepared by microwave irradiation. Nanosized CuO has been found to be more electrocatalytical ability than that of the bulk CuO particles, the oxidation current of the cysteine is enlarged on nanosized copper oxide modified carbon paste electrode. The linear relation between this sampling current and the cysteine concentration is over the range of 10 μM –10 mM with a correlation coefficient of 0.998. The detection limit is 6 μM of cysteine when the signal to noise ration is 3.
	TO cite this article:Hui Yao,Jin-Zhong Xu,Jun-Jie Zhu. CuO Nanoparticles as an Amperometric Sensor for Cysteine [OL].[20 December 2005] http://en.paper.edu.cn/en_releasepaper/content/4507


	8. New amperometric glucose biosensor by entrapping glucose oxidase into chitosan/nanoporous ZrO2/multiwalled carbon nanotubes nanocomposite film
	Xiurong Zhai,Jinxiang Zeng,Yanping Gao ,Shuguo Gong,Wanzhi Wei
	Chemistry 30 November 2005
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	Abstract:A new nanocomposite material for construction of glucose biosensor was proposed. The biosensor was formed by entrapping glucose oxidase in chitosan (CHIT)/nanoporousZrO2/multiwalled carbon nanotubes (MWNTs) nanocomposite. In this biosensing thin film, MWNTs can effectively catalyze hydrogen peroxide and nanoporous ZrO2 can enhance the stability of the immobilized enzyme. The resulting biosensor provides a very effective matrix for the immobilization of Gox and exhibites a wide linear response range of 8 mmol·L-1 to 3 mmol·L-1 with a correlation coefficient of 0.994 for the detection of glucose. And the response time and detection limit (S/N=3) of the biosensor are determined to be 6 s and 3.5 mmol·L-1, respectively. Another attractive characteristic is that thebiosensor is inexpensive, stable and reliable.
	TO cite this article:Xiurong Zhai,Jinxiang Zeng,Yanping Gao , et al. New amperometric glucose biosensor by entrapping glucose oxidase into chitosan/nanoporous ZrO2/multiwalled carbon nanotubes nanocomposite film [OL].[30 November 2005] http://en.paper.edu.cn/en_releasepaper/content/3934


	9. Nonlinear Conductive Media Based Modeling of Electrochemistry System
	Zhou Ting,Wang Kang,Xia Xinghua
	Chemistry 30 November 2005
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	Abstract:In this article, we for the first time present a nonlinear conductive media based approach for modeling of electrochemistry system using black box method. The bulk of electrolyte solution and the main body of solid electrode are modeled to be normal conductive media, while the interface between the solution and the electrode is modeled to be nonlinear conductive media, which is characterized by inconstant conductivity. This novel electrochemistry system modeling approach is verified by comparison of experiment data, and contributes to a better understanding the distribution of electrical potential and current, especially in complicated electrochemistry systems.
	TO cite this article:Zhou Ting,Wang Kang,Xia Xinghua . Nonlinear Conductive Media Based Modeling of Electrochemistry System[OL].[30 November 2005] http://en.paper.edu.cn/en_releasepaper/content/3931


	10. Off-line form of the Michaelis-Menten equation for studying the enzyme kinetics in a polymer microchip integrated with enzyme microreactor
	Liu Ailin,Zhou Ting,Xia Xinghua
	Chemistry 30 November 2005
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	Abstract:We firstly transformed the traditional Michaelis–Menten equation into an off-line form which can be used for evaluating the Michaelis–Menten constant after the enzymatic reaction. For experimental estimation of the kinetics of enzymatic reactions, we developed a facile and effective method integrating an enzyme microreactor into a direct-printing polymer microchip. Strong nonspecific adsorption of proteins was utilized to immobilize effectively enzyme onto microchannel wall, forming the integrated on-column enzyme microreactor in a microchip. The property of the integrated enzyme microreactor was evaluated by using the enzymatic reaction of glucose oxidase (GOx) with its substrate glucose. Reaction product-hydrogen peroxide was electrochemically (EC) detected using a Pt microelectrode. Rapid determination of the enzyme kinetics using our off-line form of the Michaelis–Menten equation was achieved (Km= 2.64 mM), which is much smaller than that reported in solution (Km= 6.0 mM). Due to the hydrophobic property and the native mesoscopic structure of the poly(ethylene terephthalate) film as indicated by the atomic force microscopic measurement, the immobilized enzyme in the microreactor shows good stability and bioactivity under the flowing conditions.
	TO cite this article:Liu Ailin,Zhou Ting,Xia Xinghua . Off-line form of the Michaelis-Menten equation for studying the enzyme kinetics in a polymer microchip integrated with enzyme microreactor[OL].[30 November 2005] http://en.paper.edu.cn/en_releasepaper/content/3928

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