期刊论文详细信息
Journal of the Brazilian Chemical Society
Visible LED-Based Instrumentation for Photometric Determination of Electroosmotic Flow in Microchannels
Silva, José Alberto Fracassi da1  Universidade Estadual de Campinas, Campinas, Brazil1  Coltro, Wendell Karlos T.1  Deblire, Ariane1  Jesus, Dosil P. de1  Universidade Federal de Goiás, Goiânia, Brazil1  Instituto Nacional de Ciência e Tecnologia em Bioanalítica, Campinas, Brazil1 
关键词: electroosmotic flow;    μTAS;    Lab-on-a-chip;    photometric methods;    microfluidic devices;   
DOI  :  10.1590/S0103-50532011000400017
学科分类:化学(综合)
来源: SciELO
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【 摘 要 】

An instrumental setup for electroosmotic flow (EOF) determination in microfluidic devices is described. The system is based on a trinocular microscope and an integrated photodiode OPT101. The radiation was provided by a high-intensity white LED. For the determinations, patent blue V and methylene blue aqueous solutions were used. The setup was applied for EOF monitoring in hybrid toner/glass and PDMS microchips. For the toner/glass device, the EOF mobility was determined to be (5.75 ± 0.01) 10-4 cm2 V-1 s-1 at pH 7.0. For PDMS devices the measured EOF mobility was (3.2 ± 0.1) 10-4 cm2 V-1  s-1. Reproducible measurements were obtained in all experiments, which produced results with small errors. The proposed method was compared to the conventional current monitoring method.

【 授权许可】

Unknown   

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