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Issue 23, 2011
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Broadband cavity-enhanced absorption spectroscopy for real time, in situ spectral analysis of microfluidic droplets

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Abstract

Broadband cavity-enhanced absorption spectroscopy has been used to record, in real time, the absorption spectrum of microlitre volume aqueous phase droplets within a microfluidic chip assembly. Using supercontinuum radiation and broadband coated external mirrors, the full visible spectrum (430 nm < λ < 700 nm) of each passing droplet is acquired in situ at high repetition rates (273 Hz/3.66 ms acquisition time) and high sensitivity (αmin < 10−2 cm−1). The possibilities for further improvements in sensitivity and acquisition rate using custom designed chips are discussed.

Graphical abstract: Broadband cavity-enhanced absorption spectroscopy for real time, in situ spectral analysis of microfluidic droplets

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Publication details

The article was received on 07 Sep 2011, accepted on 06 Oct 2011 and first published on 21 Oct 2011


Article type: Communication
DOI: 10.1039/C1LC20854C
Citation: Lab Chip, 2011,11, 3953-3955
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    Broadband cavity-enhanced absorption spectroscopy for real time, in situ spectral analysis of microfluidic droplets

    S. R. T. Neil, C. M. Rushworth, C. Vallance and S. R. Mackenzie, Lab Chip, 2011, 11, 3953
    DOI: 10.1039/C1LC20854C

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