Journal
ARABIAN JOURNAL OF CHEMISTRY
Volume 4, Issue 2, Pages 195-203Publisher
ELSEVIER
DOI: 10.1016/j.arabjc.2010.06.037
Keywords
Microchip solid phase extraction; Microfluidic device; Lab on a chip; Metals monitoring; Remote miniaturized sample treatment
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A downscaled solid phase (SPE) device applicable for sample preparation prior to ICP-MS monitoring, have been constructed making use of the lab on a chip concept. Standard photolithography and wet chemical etching were used to fabricate glass microfluidic devices accommodating three microchannels, each of them incorporating a defined section that could be packed with SPE materials; selective chelating resin. The microfluidic device was interfaced with the ICP-MS instrument throughout a low flow rate concentric nebuliser using a Teflon connector, and coupled with a flow injection manifold delivering samples and reagents via a manually operated splitting valve. The feasibility of the miniaturized prototype to perform SPE of trace metals was proved by analyzing trace metals, Cd, Co, and Ni, in seawater reference materials; CASS-2 and SLEW-1. The obtained result was in good agreement with the certified values. The device could be used as a remote miniaturized sample treatment for field work. (c) 2010 King Saud University. Production and hosting by Elsevier B.V. All rights reserved.
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