Ring-Down Absorption Spectroscopy for Analytical Microdevices
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Ring-down absorption spectroscopy is an emerging ‘‘label-free’’ detection method for analytical microdevices, such as micrototal analysis systems (l-TAS). Developed from the related gas-phase cavity ring-down absorption spectroscopy, fiber-optic-based ring-down techniques for liquid samples offer low detection limits, high sensitivity and fast response. ª 2006 Elsevier Ltd. All rights reserved.