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Monolayer-protected gold nanoparticles as an efficient stationary phase for open tubular gas chromatography using a square capillary: Model for chip-based gas chromatography in square cornered microfabricated channels by Gwen M Gross; Jay W Grate; Robert E Synovec is a Chemistry article available to read on EtoBox.

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The application of a dodecanethiol monolayer-protected gold nanoparticle (MPN) stationary phase within a microchannel environment was explored using a square capillary column as a model for high-speed, microfabricated gas chromatography (GC). Successful deposition and evaluation of a dodecanethiol MPN phase within a 1.3 m long, 100 m × 100 m square capillary is reported. The thickness of the MPN phase was evaluated using SEM analysis. An average thickness of 15 nm along the capillary walls was determined. While the film depth along the walls was very uniform, the corner depths were greater with the largest observed depth being 430 nm. Overall, an efficient chromatographic system was obtained with a minimum reduced plate height, h min , of 1.2 for octane (k = 0.22). Characterization of the MPN column was completed using four compound classes (alkanes, alcohols, ketones, and aromatics) that were used to form a seven-component mixture with a 2-s separation. A mixture consisting of a nerve agent simulant in a sample containing analytes that may commonly interfere with detection was also separated in only 2 s, much faster than a similar separation previously reported using a GC system r

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Author

Gwen M Gross; Jay W Grate; Robert E Synovec

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2004

Language

EN

Field

Chemistry (Physical Sciences)