Portable assay systems require inexpensive detectors that can be integrated with microfluidic sample handling. Now a mass-produced digital-camera sensor has been interfaced with different lab-on-a-chip architectures to image nanoliter reagent droplets and for quantitative photometry of colorimetric and bioluminescence assays (see contact images of the fluid-handling electrode array (right), and colorimetric (top) and bioluminescent samples (bottom)).
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Vykoukal et al. (2009) studied this question.
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