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Reference type: Journal
Authors: Zhai HY, Li JM, Chen ZG, Su ZH, Liu ZP, Yu X
Article Title: A glass/PDMS electrophoresis microchip embedded with molecular imprinting SPE monolith for contactless conductivity detection.
Publication date: 2014
Journal: Microchemical Journal
Volume: 114
Page numbers: 223-228.
DOI: 10.1016/j.microc.2014.01.006
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0026265X14000071

Abstract: A simple glass/PDMS microfluidic chip for on-line sample pretreatment and contactless conductivity detection, which consisted of a 0.17 mm-thick glass cover and a PDMS substrate embedded with an SPE monolithic column, was presented in this paper. Using this integrated microchip system, sample extraction, injection, separation and detection were automatically performed in sequence. A sample of auramine O was concentrated by molecularly imprinted SPE (MISPE), eluted to sample reservoir, and injected by electromigration into separation channel for electrophoresis separation and contactless conductivity detection, with the calculated detection limit (S/N = 3) being 2.5 μg mL-1. The monolithic column was utilized to quantitatively extract auramine O, yielding an on-line enrichment factor of about 12. The microchip system is reliable and applicable to the analysis of auramine O in food sample
Template and target information: auramine O
Author keywords: Microchip, capillary electrophoresis, Contactless conductivity detection, molecularly imprinted solid-phase extraction, Auramine O

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