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Towards disposable lab-on-a-chip: poly(methylmethacrylate) microchip electrophoresis device with electrochemical
Joseph Wang1, Martin Pumera, Madhu Prakash Chatrathi
1Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA. joewang@nmsu.edu
Abstract:
A fully disposable microanalytical device based on combination of poly(methylmethacrylate) (PMMA) capillary electrophoresis microchips and thick-film electrochemical detector strips is described. Variables influencing the separation efficiency and amperometric response, including separation voltage or detection potential are assessed and optimized. The versatility, simplicity and low-cost advantages of the new design are coupled to an attractive analytical performance, with good precision (relative standard deviation RSD = 1.68% for n = 10). Applicability for assays of mixtures of hydrazine, phenolic compounds, and catecholamines is demonstrated. Such coupling of low-cost PMMA-based microchips with thick-film electrochemical detectors holds great promise for mass production of single-use micrototal analytical systems.