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Toward sol-gel electrochromatographic separations on a chip


Morishima, K and Bennett, BD and Dulay, MT and Quirino, JP and Zare, RN, Toward sol-gel electrochromatographic separations on a chip, Journal of Separation Science, 25, (15-17) pp. 1226-1230. ISSN 1615-9314 (2002) [Refereed Article]

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DOI: doi:10.1002/1615-9314(20021101)25:15/17<1226::AID-JSSC1226>3.0.CO;2-G


A porous photopolymerized sol-gel (PSG) monolith was synthesized in the separation channel of a borosilicate glass chip via UV irradiation (5 min) of a mixture of 3-methacryloxypropyltrimethoxysilane, an acid catalyst, a porogen, and a photoinitiator. The PSG monolith adhered strongly to the chemically untreated channel walls. The chip was fabricated using standard lithography procedures to give channels that are 35-m deep and 90-m wide. Masking the other channels defined the 4.7-cm PSG section in the separation channel. Two dyes Coumarin 314 and 510 were successfully separated within baseline resolution in 225 s when fluorescent detection occurred immediately after the PSG section. The separation time was reduced to 80 s with little loss in resolution by detecting the dyes 1.2 cm from the front of the PSG monolith.

Item Details

Item Type:Refereed Article
Keywords:Photopolymerized sol-gel Capillary electrochromatography Chip
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Quirino, JP (Associate Professor Lito Quirino)
ID Code:54873
Year Published:2002
Web of Science® Times Cited:43
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2009-03-02
Last Modified:2011-11-16

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