Disposable twin gold electrodes for amperometric detection in capillary electrophoresis

2004 ◽  
Vol 25 (17) ◽  
pp. 2965-2969 ◽  
Author(s):  
Eduardo M. Richter ◽  
José A. Fracassi da Silva ◽  
Ivano G. Rolf Gutz ◽  
Claudimir L. do Lago ◽  
Lúcio Angnes
Keyword(s):  
Capillary Electrophoresis ◽  
Amperometric Detection ◽  
Gold Electrodes

Microchip Capillary Electrophoresis Based Separation and Detection of Cysteine and Homocysteine

2013 ◽  
Vol 647 ◽  
pp. 482-486 ◽  
Author(s):  
Rohit Chand ◽  
Da Woon Han ◽  
Kamrul Islam ◽  
Ik Jun Yeon ◽  
Sung Sik Ko ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Glass Substrate ◽  
Amperometric Detection ◽  
Gold Electrodes ◽  
Microchip Capillary Electrophoresis ◽  
Biochemical Processes ◽  
Conventional Photolithography

Cysteine and homocysteine are the biological thiols which have an important function in various biochemical processes in our body. Alterations in their level lead to various abnormalities. Therefore, we fabricated a miniaturized platform for capillary electrophoresis that could separate and detect these amino thiols electrochemically. The device was fabricated using conventional photolithography technique on the glass substrate. The microchannel was molded in polydimethylsiloxane with gold electrodes deposited on glass for separation and detection. Based on the amperometric detection, we could detect cysteine in 93 sec while homocysteine was detected in 111 sec.

Determination of Effective Ingredients in Compound Sulfamethoxazole Tablets by Capillary Electrophoresis with Amperometric Detection

2008 ◽  
Vol 36 (3) ◽  
pp. 292-296 ◽  
Author(s):  
Chu Qing-Cui ◽  
Tian Xiu-Hui ◽  
Jiang Lian-Mei ◽  
Zhou Wen-Jun ◽  
Ye Jian-Nong
Keyword(s):  
Capillary Electrophoresis ◽  
Amperometric Detection

Amperometric Detection of H2O2 Using Gold Electrodes Modified with Starburst PAMAM Dendrimers and Prussian Blue

2006 ◽  
Vol 18 (21) ◽  
pp. 2092-2098 ◽  
Author(s):  
Erika Bustos Bustos ◽  
Thomas W. Chapman ◽  
F. Rodríguez-Valadez ◽  
Luis A. Godínez
Keyword(s):  
Prussian Blue ◽  
Amperometric Detection ◽  
Pamam Dendrimers ◽  
Gold Electrodes

Analysis of Synthetic Antioxidant in Food by Capillary Electrophoresis

2011 ◽  
Vol 361-363 ◽  
pp. 1855-1858 ◽  
Author(s):  
Qian Xiang ◽  
Ying Gao
Keyword(s):  
Capillary Electrophoresis ◽  
Amperometric Detection ◽  
Peak Height ◽  
Butylated Hydroxyanisole ◽  
Applied Potential ◽  
Synthetic Antioxidant ◽  
Separation Potential ◽  
Relative Standard ◽  
Capillary Electrophoretic

A capillary electrophoretic assay for determining synthetic antioxidant butylated hydroxyanisole in food has been developed. The extraction with 70% (v/v) methanol quantitatively extracted synthetic antioxidant. The separation was carried out by CZE using phosphate at a separation potential of 18 kV. Amperometric detection was achieved with an applied potential of 0.60 V. A linear relationship between the peak height and the concentration of the analyte was found in the range 1.8-180 µg/mL for BHA, with correlation coefficient of 0.994. The relative standard deviations of migration time and peak height were 0.19 and 5.3 %, respectively. The method developed was successfully applied for the determination of synthetic antioxidant butylated hydroxyanisole in food. Recovery of butylated hydroxyanisole was 93%.

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