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The development of non-invasive optical fibre sensor array for on-line monitoring of pH in microbioreactors is described. The working principle is based on the optical absorption of phenol red contained in culture medium. Different from other devices of the similar working principle, the proposed device requires less liquid volume (less than 0.8 mul), is non-invasive, and particularly can be configured...
A microfluidic device with integrated optical fibres was developed for online monitoring of lactate. The device consists of a SU-8 waveguide, microfluidic channels and grooves for the insertion of optical fibers. Different channel widths (50-300 mum) were tested. A wide range of flow rates were applied to investigate the influence of flow rate on signal fluctuations. The separation between optical...
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